*Dual channel *Continuous mode *Pulse rate, pulse width and intensity are fully adjustable *System Includes: Stimulator, Lead Wires, 4 Self-Adhesive Reuseable Electrodes, 9 Volt Battery, Hard Plastic Carrying case, Instruction Booklet Technical Specifications: ProM-100 (TENS single mode) *Channels: Dual, isolated between channels *Wave Form: Asymmetrical Bi-phasic square pulse *Pulse Amplitude: Adjustable 0-80mA peak into 500 ohm load each channel, constant current *Pulse Frequency: 2Hz-120Hz adjustable *Pulse Width: 40us - 260us adjustable *Maximum Charge: 21 micro coulombs per pulse *Power Source: 9 volt alkaline battery or similar rechargeable cell *Battery Life: 70 hours average usage (alkaline) *All values have 10% +/- tolerance