The EV-806A DIGITAL TENS/EMS is a battery operated pulse generator that sends electrical impulses electrodes to the body and reach the nerves and underlying muscle group. This unit is a combination stimulator of TENS and EMS which can be used for muscle stimulation and pain relief. The device is provided with two controllable output channels, each independent of each other. An electrode pair can be connected to each output channel. The intensity controls are protected by a cap to avoid accidental touch. The settings are controlled by press buttons.

Specifications 
Channel - Dual, isolated between channels 
Pulse Amplitude Adjustable, 0-100 mA peak into 500 ohm load each channel. 
Pulse Rate - Adjustable, from 2 to 150 Hz, 1 Hz/step 
Pulse Width - Adjustable, from 50 to 300 microseconds, 10 µs/step 
Mode - Five TENS Modes: B(Burst), N(Normal), M (Modulation), SD1 (Strength Duration), SD2 Three EMS C(Constant) S (Synchronous), A(Alternate) 
Timer - Two Adjustable timers, from 1 to 60 minutes or Continuous. Adjustable in 1 minute each step from 1 to 15 minutes, and 5 minutes each step from 15 to 60 minutes. Treatment time countdown automatically. 
Waveform - Asymmetrical Bi-Phasic Square Pulse 
Voltage 0 to 45V (Load: 500 ohm) 
Size 10.1cm(L) x 6.1cm(W) x 2.45cm(H)