This pocket size unit has 2 2.5 outputs with 4 modes and 10 levels of intensity. Ability to change pulse width/speed, turn dial intensity control. Impulse Frequency 2-100 Hz. Uses 2 AAA (1.5 v) batteries not included. Kit will include (2) 2.5 mm 2 pin lead-wires and 1 sheet of 4 50 mm square pads.