EMS Mini Electric Neck Muscle Massager Portable Exercise Relaxation Cervical Back Massager Stimulator Product Information Small size, light weight, easy to carry and store. 6 modes are adjustable to meet different needs. Massage parts: neck/back/waist/buttocks/legs and other parts. Type (optional): 01 Battery type: Host + massage sticker + manual. 02 Charging type: Host + USB charging cable +massage sticker + manual. Instruct: 1. Twist the host with a gel patch. 2. Uncover the transparent film on the gel patch. 3. Stick the instrument on the part that needs to be massaged. 4. Press the "ON/" key to turn on, the light is always on, and then press the "ON/" key to turn on, the light flashes. 5. Press button to select the desired mode. 6. Adjust to the massage intensity that suits you. Continue to press "ON/" to increase the intensity, and "OFF" to decrease the intensity. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement.