Pain Relief Unit, (3) pre-set program, (5) intensity levels, 15-minute automatic power off function, rectangular biphasic waveform, (2) 100Hz pulses per second, single channel output. Package includes: instruction manual, electrode, (2) AAA batteries, (2) long-life pads and storage unit, combo QuickStart and Pad Placement Guide.- Accessories: Long-Life Pads, No Mess, Self-Adhesive, Pre-Gelled (One person use only), 2 pkg, 48/cs (US Only)