Features: Charging fee: Requires connection to power source. Multi-functional radio frequency hair comb: It can promote scalp microcirculation, EMS current stimulates muscle movement, scalp hair glows and grows, promotes skin to wake up sleeping hair follicles, and four-color light cares for hair roots. (With liquid storage tank, care solution can be added for use) Packing list: 1 host, 1 charging cable, 1 manual. Easy to hold: Ergonomic handle design makes it easy to hold and save effort. Anti-hair loss: Radiofrequency can be used to stimulate hair growth and strengthen scalp hair roots. Note: 1. Due to different light effects, the actual color may be slightly different from the image 2. Please allow 1-3 cm deviation due to manual measurement Size: 216x42x37mm Product Name: Radio Frequency Hair Comb Product Model: KD3806A Working Voltage: 3.7V-=Rated power: 6.0W Charging power supply: 5.0V-=1A Net weight: 137 grams Product size: 216x42x37mm Implementation standard: GB-4706.1 GB-4706.15 Packing list: 1 host, 1 charging cable, 1 manual. Includes: 1 Practical RF Generator Hair Comb