Functional characteristics: 1. Double output, color screen display; 2. Suitable for neck, back, arms and legs. Each part has 8 modes to choose from: 3. 6-speed timing : 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes and 30 minutes; 4. Each mode has 15 gears that can be adjusted (it can only be adjusted if there is a load, which means it can only be adjusted if it is attached to the body). Product : general goods (powered by 3 AA batteries, shipped without, or external USB power cord) Power cord length: about 91cm Product size: 17 x 11 x 4.5cm Rated voltage: DC4.5V Rated power: 0.15W Rated working hours: 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes; Patch specification: 3.5mm diameter buckle Color: White Material: plastic Package Contents: 1 x host 8 x patch 1 x English instruction 2 x 1-2 electrode wires 1 x USB wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.