A three mode TENS unit with a timer. In Burst mode, the TENS unit produces a series of seven quick pulses followed by a rest. The cycle repeats itself twice every second. In Modulation mode, the TENS unit automatically varies the amplitude of the pulse every four seconds. This is a dual channel unit, which allows you to use up to four electrodes at a time (two electrodes per channel). The TENS unit is portable and may be clipped to a belt, shirt pocket, bra or other clothing.

Includes:

• One pack of 4 electrodes 
• 9V Battery 
• Instruction manual 
• Modified square wave 
• Pulse frequency 2-150Hz adjustable
• Mode modulation pulse amplitude varies burst, 7 pulses/burst, 2 bursts/sec.,100 Hz
• Timer 30, 60, constant 
• 2 channel 
• Lead wires 
• Hard shell case