Attention: This Therapy Machine is Not suitable for the people who are having the following symptoms: Malignant tumor; VD infection; Fever above 38; Heart disease patients; Women in menstrual phase or pregnant; Or if you have any other particular symptoms, please consult your doctor before using. Do not use the product at the same time with the following therapeutic electronic instruments: 1. Internal transplanted instrument, such as artificial heart rate regulator. 2. Life maintenance based instrument such as artificial cardiac pacemaker. 3. Iapel based instrument such as electrocardiograph. Specifications: 100% new and high quality Material: Plastic Large size LCD Screen Size: 153 x70 x28mm Machine Net Weight: 80g Voltage:4.5V Power by: USB power cable or 3 x AAA batteries (not included) We suggest don’t use batteries and USB power cable at the same time. Note: Colours may vary slightly due to flash photography,please understand. Size may be 1-3cm inaccuracy due to hand measure, please make sure you don’t mind before you order. Package included: 1 x Digital Therapy Machine 1 x Plastic tray 4 x Electrode Pads(Optional) 1 x 2-Way Electrode Pad wire / connector How to use: You need to install the battery, and then tear the pad pasting,and put the two electrode slice to your body at the same time, Click to open the key “ON”, Click to open the key”STRONG” or “WEAK”, Click to open the key”MODE”, and then it will work well, thank you .