Color: white Material: ABS, silicone Voltage: DC5V Power supply: USB Battery capacity: 650mah Charging time: 2-3 hours Using time: 2 hours Features: massage instrument, prevention of cervical spondylosis, physiotherapy machine, multifunctional Product size: 17.5*13*13cm Note: Use wet towel to wet the neck before using to avoid possible sense of piercing pain. How to use: 1) Before use, first wet the skin of the cervical spine with a wet towel, and then put the product around the neck, make the electrode close to the skin of the cervical spine, adjust the position of the product, turn on the host and adjust the appropriate massage intensity and mode. 2) Press [ON/OFF] button to enter the default mode, the default gear position(0 gear). 3) Press [M] button to switch mode, 6 modes available. 4) Press [+]/[-] button to adjust intensity 5) Press the middle button for heating up function. Notes: 2. Please allow slight deviation for the measurement data. 3.Thanks for your understanding Package list: 1Pcs * massage instrument 1Pcs * remote control 1Pcs * connecting cable 1Pcs * English manual