Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. Twin Stim TENS and EMS combo * Our most popular digital electrotherapy unit * The Twin Stim gives the user the choice of 5 modes of TENS and 2 Modes of EMS * Twin Stim's features include, Dual Channel, 7 modes, Timer, Patient Compliance Meter, 100mA output, safety amplitude cover, sturdy metal belt clip, rubber side railings for maximum handling * Channels: Dual Channel, isolated between channels * Pulse Amplitude: Adjustable, 0-100 mA peak into 500 ohm load each channel * Voltage: 0 - 50V (Load: 500 ohm) * Pulse Rate: Adjustable, from 2 to 150 Hz, 1 Hz/step * Pulse Width: Adjustable, from 50 to 300 microseconds, 10uS/step * Wave Form: Asymmetrical Bi-Phasic Square Pulse * On Time: Adjustable, 2~90 seconds , 1 Sec./ step * Off Time: Adjustable, 2~90 seconds , 1 Sec./ step * Ramp Time: Adjustable, 1~8 seconds, 1 Sec./ step, The "On" time will increase and decrease in the setting value * 3 EMS Modes: Constant ,Synchronous, Alternate * Constant stimulation based on setting value * Only pulse width, pulse rate and timer are adjustable in this mode * "Constant" is equal to the "Normal" mode of a TENS unit * Synchronous: Stimulation of both channels occurs synchronously * 5 Modes: B(Burst), N(Normal), M(Modulation), SD1(Strength Duration), SD2 * System Includes: Stimulator, Lead Wires, 1 package of high quality Self-Adhesive Electrodes, 9V Battery, Hard Plastic Carrying Case, & Instruction Booklet *