Features: 16 stimulation modes, you can choose between a diverse range from knocking, kneading, shiatsu and more. 16 Massage techniques help to relieve pain, including shoulder, waist, back, buttocks, etc. (Pressing the "m" button to change the mode). Create a scheduled timer from 10-60min by pressing the "t" button. And, the unit will automatically shut-off when the time is up. Also, there are 10 intensity levels, easy to adjust by pressing the "+/-" button to increase or decrease the intensity. 2 Outputs are isolated and has the same power, allow 2 sets of pads to be applied to the different areas at the same time. Also, you can share with your friends or family members to have a fantastic massage experiences together. Compact size(9.5X5.0Cm)and lightweight (only 52g) design, easy to carry, you can use it conveniently anywhere and anytime. The lcd display with backlight provides better viewing at day or night. And, the battery indicator will flash when it need to recharge batterySpecifications: type: massager modes: 16 output: 2 adapter :us/eu (110-240v) usb charger: 5v power supply: usb port item size:9.5*1*5Cm item weight:52g package size:14.5*8*7Cm package includes: 1 * tens control unit device 2 * large pad 2 * small pad 2 * electric wire 1 * usb cable & adapter 1 * acupuncture point chart 1 * english instruction manual .