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    Home » Ronix 8851 POWER-PRO Massage Gun Instruction Manual
    Ronix

    Ronix 8851 POWER-PRO Massage Gun Instruction Manual

    By Gabriel SmithNovember 23, 2025Updated:December 4, 2025No Comments10 Mins Read
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    Ronix 8851 POWER-PRO Massage Gun
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    Ronix 8851 POWER-PRO Massage GunRonix-8851-POWER-PRO-Massage-Gun-productSafety Instructions

    To reduce the risk of malfunction, electric shock, injury, fire, death, and equipment damage, please read all instructions and warnings on this product in this manual before using this product.

    1. Do not use it by or near children. Do not use this product and accessories as toys.
    2. It is forbidden to use on non-dry, clean skin surface.
    3. It can be used across the clothes and gently pressed and moved on the skin for about 60 seconds.
    4. Do not use above the neck or any hard or boned part of the body, or sensitive areas.
    5. Use the product only on the soft tissues of the body without causing pain or discomfort.
    6. Do not massage areas that are bruised or on open wounds.
    7. Stop use if you have any signs of abnormal pain or discomfort.
    8. Do not place any objects on the vents of the product.
    9. Do not immerse in water or allow water to enter the vents of the product.
    10. Do not drop or expose the product to a fire source.
    11. Do not drop or improperly use the product.
    12. Keep away from liquids or heat sources. Keep the vents free of dust and debris.
    13. After charging is complete, remove the charger from the battery.
    14. Please note that the device can not be used when charging.
    15. Please use the device according to the instructions for use.
    16. Carefully inspect the equipment before each use.
    17. In order to ensure that the product can be used continuously, please charge the product in time to ensure that the product is always powered, and prevent the product from being unable to turn on due to a lack of power.

    Specifications

    Model8851
    BatteryLi-ion battery/1600mAh
    Motor typeBrushless Electric Machine
    Motor SpeedMAX: 2800RPM
    Speed Mode3 Level Adjustable
    Speed1st Speed: 1600RPM, 2nd Speed: 2200RPM, 3rd Speed: 2800RPM
    Amplitude10mm
    Noise level60db
    Charge time2ACharge: 4H
    Head(type/application)1: U-shaped massage head
    2: Flat massage head
    3: Cone massage head
    4: Round circular massage head
    Include1-  Charger+type C cable
    2-  4 Massage Heads
    3-  Manual

    Part ListClose-up of U-shaped massage head for neck and spine

    1. Speed- Level Indicator Light: From Left to Right (1 — 4 levels)
    2. Battery- Level Indicator: 4 Lights—100% full of power
        • Lights— 65%-80% of power
        • Lights— 40%-60% of power
        • Light— Less power, please charge asap.
    3. ON/OFF Switch: Long-press for 2 seconds to start/stop the device, short-press to adjust the speed level from level 1 to level 3.

    Assembly

    Insert/Pull the head into the hole of the black connector, and rotate it at the same time until it can not go in/out. Special U-shaped, align the two Vertical lines on the head and the black connector, and then insert the U-shaped into the hole of the black connector, and press it until it can not go in/out.Flat massage head attached for full body muscle relaxation

    When assembling a U-shaped head, align the inner side of the horizontal line (the red line) with the machine, which means in place. If there is a gap between the line and the machine, there will be a risk of falling off when using it.

    Charging
    1. Fully charge the battery for six hours before first use.
    2. When charging, connect the Type-C port of the provided charging line to the battery charging port and connect the USB port to the charger.
    3. The Battery Level Indicator is flashing regularly when the device is charging.
    4. When the first light is on, the remaining power is 20%-35%; when the second light is on, the remaining power is 40%-60%; when the third light is on, the remaining power is 65%-80%; when the fourth light is on, the remaining power is 85%-100%.
    5. The battery can be charged in the situation of any time and with any amount of electricity; the device can be started while charging.
    6. The battery is exhausted to less than 20% (the first left Battery – Level Indicator LED flashes) and needs to be recharged.
    7. The average running time is about 2 hours, depending on the speed level and pressure during use.

    AccessoriesCone massage head for deep tissue percussion

    Operation

    1. Press and hold the ON/OFF Switch to turn the device to level 1 speed. Each press of the button will increase one level until the level 4 speed. Press the button at level 4 to enter the standby mode (level 0), level 4 to level 0. Press and hold again for 3 seconds to turn the device to level 1, and so on.
    2. Under any speed levelpressingss and holding can close the device. Breathing light flashing.
    3. In the standby state, press and hold for 3 seconds to shut down directly 15 seconds without operation will automatically shut down.
    4. The device will stop running after 10 minutes of continuous use for intelligent protection. Restart it again if you use it again after the device shuts down.
    5. This is an abnormal operation protection function setting. From running to standby mode, short-press the button to restart; it’s a normal situation.

    If you are interested in exploring other Ronix tools, check out the Ronix RH-9855 6-inch Digital Measuring Wheel for precise distance measurement in construction and DIY projects.

    Maintenance, Cleaning, Storage & Transportation

    1. Use a slightly damp towel to clean the device and dry it with a soft cloth.
    2. For storage or travel, store the device in the supplied portable bag.
    3. Store in a dry, well-ventilated place with no corrosive gases, no less than 250mm from the ground, and no more than 5 stacked layers.
    4. If not used for a long time, the device should be cleaned, then packaged in storage, and charged every month.
    5. This product is suitable for automobile, train, ship, and airplane transportation.
    6. This product should be fixed in transportation to prevent violent vibration, collision, tumbling, and falling, and should be put upward, put down gently, and avoid damp areas.

    Environmental Instructions

    At the end of the service life of this product, please do not throw it away with general household waste. Put this product in the designated recycling station of the government. You can also send this product back to the after-sales service center of the factory. The personnel of the service center will handle it in an environmentally friendly way.

    Environmental Protection Period Description

    This electronic and electrical appliance is being used under the conditions of this manual, the harmful substances or elements contained therein are not leaked, and the period of time during which it does not cause pollution to the environment or cause serious damage to people and property is 10 years.

    UsageRound massage head on massage gun for large muscle groups

    Speed and battery level indicator lights on the Ronix 8851

    U-Shaped

    • Suitable for massaging the neck, spine, and Achilles tendon

    Round

    • Suitable for massage arms, waist, back, buttocks, large muscles like legs, and legs

    Cone

    • For an impact deep organization, such as the palmar and plantar meridians

    Flat

    • Suitable for massaging the body muscles of various parts

    Arm

    Charging the Ronix 8851 POWER-PRO massage gun with Type-C cable

    Brachioradialis10-15s × 3 times
    Flexor Carpi Radialis10-15s × 3 times
    Palmaris Longus muscle12-15s × 3 times
    Flexor Carpi Ulnaris Muscle10-15s × 3 times
    Extensor Digitorum05-10s × 2 times
    Muscle Extensor Carpi Radialis Longus05-10s × 2 times
    Muscle Extensor Carpi Radialis Brevis05-10s × 2 times
    Biceps Brachii12-20s × 3 times
    BrachiaLis12-20s × 3 times
    Deltoid12-20s × 3 times
    Pectoralis Major12-20s × 3 times

    Shoulder

    User inserting a massage head into the black connector

    Triceps Brachii15-20s × 3 times
    Rhomboid Muscle20-30s × 3 times
    Trapezius Superior Fasciculus15-20s × 3 times
    Trapezius Intermedius Fasciculus15-20s × 3 times
    Trapezius Lower Fasciculus15-20s × 2 times
    Supraspinatus10-15s × 2 times
    Levator Scapulae Muscle10-12s × 2 times
    Teres Major Muscle10-12s × 3 times
    Teres Minor Muscle10-12s × 3 times
    Infraspinatus10-12s × 3 times
    Tips: Massage the muscles from the middle to the sides, from top to bottom.

    erectorspinae(lumbarsegments)

    30-60s × 3 times
    Iatissimus Dorsi30-60s × 3 times

    Waist

    Portable carrying bag with massage gun and accessories

    Thoracic Lumbar Fascia40-60s × 3 times
    Psoas Major30-60s × 3 times
    Internal and External Oblique Muscles10-15s × 2 times
    Erector Spinae (Thoracic Segments)15-20s × 2 times
    Quadratus Lumborum20-30s × 2 times
    Iliopsoas Muscle20-30s × 2 times
    Gluteus Maximus30-60s × 3 times
    Gluteus Medius30-60s × 3 times
    Piriformis60-90s × 3 times

    Leg

    Ronix 8851 massage gun in use on forearm muscles

    Biceps Femoris Muscle20-30s × 3 times
    Semitendinosusi20-30s × 3 times
    Muscle Semimembranosus20-30s × 3 times
    Gracilis10-15s × 3 times
    Muscle Adductor Brevi10-15s × 2 times
    Muscle Adductor Longus10-15s × 2 times
    Muscle Rectus Femoris Temoriss30-45s × 2 times
    Vastus Lateralis Muscle30-45s × 2 times
    Vastus Medialis Muscle30-45s × 2 times
    Sartorius30-45s × 3 times

    Foot

    Illustration of proper arm and shoulder massage positions

    Muscles gastrocnemius20-30s × 3 times
    Soleus20-30s × 3 times
    Tibialis anterior muscle15-20s × 3 times
    Peroneuslongus15-20s × 3 times
    Short peroneal15-20s × 2 times

    Massage Gun Operational Troubleshooting

    Fault Description: Fault Exclude

    The massage head slides out and dropsPlease check that the massage head is installed in place.

    (See instructions for detailed operation on the 5th page)

    The device is unable to chargePlease check whether the charging port and power supply are plugged in.

    Check whether the voltage and current of the charging head match the product requirements.

    The massage head stops running after the external forceThis is an abnormal operation protection function settiFromfrom running to standby mode, short-press the button to restart; it’s a normal situation. (See instructions for detailed operation on 8th page)

    Reasonable use of the product can effectively extend the service life. Suggestion:

    1. Do not throw or drop when using.
    2. The maximum continuous use time is not more than 30 minutes, The maximum continuous use time should not exceed 30 minutes. Keep away from a damp environment when using or storing.
    3. If you don’t use it for a long time, please charge the product once a 1 month to ensure that the product is always powered.

    Customer Support

    • Address: Lyoner Str. 36 60528 Frankfurt am Main
    • Tel:+49 69 310 900 66
    • Website: www.ronixtools.com

    FAQs

    Q: How does the massage gun work?

    It sends quick pulses deep into muscle tissue using high-frequency percussion vibrations. After vigorous exercise, this aids in releasing tension, breaking up lactic acid accumulation, and enhancing mobility.

    Q: How many speed levels does the Ronix 8851 have?

    Depending on your comfort level and muscle condition, the Ronix 8851’s six programmable speed settings let you select between intense deep-tissue stimulation and mild relaxation.

    Q: How long does the battery last on a full charge?

    Up to five hours of continuous use are possible with the integrated rechargeable lithium-ion battery, contingent on the pressure and speed level chosen.

    Q: How long does it take to fully charge the massage gun?

    Using the included charging adaptor, a full charge usually takes two and a half to three hours. When the charging process is over, the LED indication light will turn green.

    Q: Can I use the Ronix 8851 while it’s charging?

    No. The device must not be used when plugged in for safety concerns. Before using it, always unplug it from the charger.

    Q: Is the massage gun noisy during operation?

    No. The Ronix 8851 offers strong performance and quiet comfort at less than 55 dB thanks to cutting-edge brushless motor technology.

    deep tissue massage gun handheld massager massage gun guide massage gun tips massage gun troubleshooting muscle recovery tool OnyxGuides Manual percussive massage gun Ronix 8851 massage gun Ronix 8851 POWER-PRO Ronix massage gun manual User Manual
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    Gabriel Smith

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