Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. Kit contains: one dual channel tens stimulator, carry case, set of lead wires, instruction manual, 9V batteries and set of electrodes * Channels: Dual isolated between channels * Pulse amplitude: 12 V, Output Volt, No load * Pulse frequency: 0.5, 8, 80 Hz selected * Pulse width (microseconds): 6250 Fixed * Wave form: Asymmetrical bi-phasic square pulse * Timer: 10,20 and 40 minutes * Mode selector: None *