24 massage modes, 20 levels of intensity adjustment, AB dual output, 60 minutes timing adjustable, comprehensive massage to relax. Features: 24 different modes, 20 levels of intensity adjustment, ease your pain and get a relaxing massage. AB dual output (the principle of AB channel output is, for example, A outputs 1 mode and B can output 2 mode. The two modes do not interfere with each other). 60 minutes timing adjustable. Built-in rechargeable lithium battery, flat round interface, convenient to charge. Pain relief for shoulder, elbow, neck, muscle, knee, back, foot. Specifications: Material: Aluminum alloy Built-in Lithium Battery Capacity: 200MA Output Voltage: 5V Output Current: 500MA Power: 2.5W Item Size: 120 * 60mm / 4.72 * 2.36in Package Weight: 316g / 11.15ounces Package Size: 148 * 80 * 70mm / 5.83 * 3.15 * 2.76in Package list: 1 * Host 1 * Pair of Palm-shaped Patches 1 * Pair of Oval-shaped Patches 2 * Electrode Wires 1 * USB Cable 1 * Winding Board (tool for placing the patch and wire after massage) 1 * Instruction Manual 1 * Meridian Diagram