Characteristics: 36 massage modes, 20 levels of intensity adjustment; dual output, 60-minute timer adjustable Accessories 1 set * host 1 pair * palm-shaped patch 1 pair * oval patch 2 * electrode lead 3.5 head 1 * power charger 1 * USB cable 1 * winding version (the tool for placing the patch and lead after massage) 1 book * manual 1 * meridian chart 1 flocking blister; [Parameters] Battery capacity: 200MA , output frequency: 0-104Hz, input voltage: AC110-240V, output pulse width: 80us Large LCD screen - This TENS electrotherapy device has an LCD screen with backlighting and enlarged symbols and buttons to make it easier to read and operate. You can set the working time of the electrical stimulation device to 10-60 minutes, which is sufficient for your massage requirements.