Features Dual channel (4-lead) all digital TENS Five treatment modes (Normal, Burst, Modulated Rate, Modulated Width 1, Modulated Width 2) Snap-on faux leather protective holster with metal belt clip Attractive high-tech design with metallic finish w/ LCD display Easy-to-use push-button controls for all settings Last setting recall settings lock Compliance monitor The Medi-Stim DuraTENS Unit is a dual channel (4-lead) all digital TENS unit with 5 treatment modes and a snap-on faux leather protective holster with a metal betal clip. This device also feature an attractive high-tech design with a metallic finsh and an LCD display. Also, this unit comes with 1 package of 4 reusable self-adhering electrodes, 1 set of 43" pin lead wires, 1 each 9V heavy duty battery, a carrying case, and an instruction manual. Specifications Technical Channel: Dual, isolated between channels Amplitude: 0 - 80 mA peak into 500 ohm load each channel Output Voltage: 0 - 40 V peak into 500 ohm load each channel Waveform: Asymmetrical biphasic square pulse Pulse Rate: Adjustable, 1 - 150 Hz Pulse Width: Adjustable, 30 - 300 µS Modes: Five (Burst, Normal, Modulation, M1, M2) Burst (B) - Burst Rate adjustable 0.5 - 5 Hz, Pulse Width adjustable 30 - 300 µS, Frequency fixed at 100 Hz, Normal (N) - Pulse Rate adjustable 2 - 150 Hz, Pulse Width adjustable 30 - 300 µS, Modulated Rate - Pulse Rate decreases linearly over 5 seconds 40% of original setting, then increases over 5 seconds back to its original setting. Modulated Pulse Width 1 - Decreases linearly over 5 seconds 40% of Width1: original setting, then increases over 5 seconds back to its original setting. Modulation Pulse Width 2 - Decreases linearly over 5 seconds 70% of Width2: original setting, then increases over 5 seconds back to its original setting. Timer: 30, 60 minutes, and continuous Power Supply: One 9-volt battery Size: 6.0 cm (L) x 9.3 cm (W) x 2.5 cm Weight: 110 grams with battery Additional Information 3 year warranty Treatment timer (30, 60 minutes or Continuous) LCD display shows all parameters on screen Power ON/OFF button for easy shut-off