N305 is a basic type of EMS with adjustable contraction and relaxation time. It has 3 options of ramp time and pulse rate adjustment. Pulse duration is fixed at 250µs. The unit with a protection cap on the top is available by order. Channel: Dual, isolated between channels Pulse Amplitude: 0-80mA peak to peak into 500 ohm load. Pulse Rate: Adjustable, 5, 30, 100 Hz Pulse Width: Fixed at 250 µs Contraction Time: Adjustable, 1 ~ 30 sec. Relaxation Time: Adjustable, 1 ~ 45 sec. Ramp Time: Selectable, 1, 3, 5 Seconds. Wave Form: Asymmetrical Bi-Phasic Square Pulse Voltage: 0-45 V peak into 500 ohm load Size: 95(H)x65(W)x 23.5(T)mm