Features : 1. EMS and vibrating technology work together for effective import, promoting the absorption of hair care product. 2. Quickly activate the hair follicle root nerve and capillary, relieve brain fatigue, reduce mental pressure. 3. Relieve head pain, promote metabolism, maintain brain health, massage specific acupoints on the head to improve sleep quality. 4. You can add hair growth liquid or nutrient solution into the water tank, liquid will outflow with the vibration massage, nourish hair. 5. Energize the scalp from the source, reduce hair loss and dandruff, deeply care for hair and scalp. 6. Conform to ergonomic design, the handle is easy to grip, saving effort. 7. 15 minutes auto power off, humanized reminder of indicator light and voice reminder, upgraded using experience combined in this mini device. Specification : Item Type: Head Massage Comb Charging Voltage: 3.7-4.2V Battery Capacity: 750mAh Vibration Frequency: 7500pm Service Power: 0.75W Charging Time: 3.5h Water Tank Capacity: 10ml Using time: 15mins (15 minutes auto power off) EMS gear: 3 Vibrating gear: 3 Package include: 1 x Head Massage Comb 1 x USB Cable 1 x Manual How to use: 1) Anticlockwise rotate ring till take it off. 2) Slowly add liquid into it. (the max. capacity is 10ml). 3) Clockwise tighten the ring before using. 4) Long press the [ON/OFF] button for power on. It enters the default setting of ion import function + 1st gear vibration, with the infrared light on. 5) According to your need, press the [Vibrating] button for gear adjustment(3 gears available). 6) Press [EMS] button for electricity adjustment(3 gears available). White indicator on: 1st gear flashes 1 time, 2nd gear flashes twice, 3 gear flashes 3 times. Specification: Material: PC, ABS, silicone Guiding Comb Maximum capacity: about 30ml Size: 60*58mm Color: White, Black, Gold Feature: 1.Flexible and accurate rolling ball teeth allow you to adjust the smear pressure carefully with smooth liquid flowing out evenly on your hair roots, also to gently massage the scalp for accelerated absorption of the liquid. 2.Maximum 30ml capacity liquid container with 16mm filling hole, quick to add the liquid and avoid the frequent refill hassle, practical and convenient. 3.Hand size fit and compact size design delivers comfortable and secure grips, the bottom cap can help protect the comb teeth from dust for improved hygiene. 4.Anti-explosion and environmentally friendly shell material with soft top cover for better sealing effect, durable and sturdy for long time repeat use. 5.Portable and lightweight enables carrying breeze, support both dry and wet manual use, no battery is needed, ideal for home and travel application. Use Tips: 1. When closing the top cover after adding the liquid, the action should be light to reduce the pressure of closing the cover which can reduce the overflow of liquid. 2. When there is liquid in the liquid container, please make sure the rolling ball comb teeth facing up to prevent the liquid from overflowing.