The Twin Stim Which Gives The User The Choice Of Five Modes Of Tens And Two Modes Of Ems * Features Include Dual Channels Seven Modes Timer Patient Compliance Meter New Stronger 100 Ma Output Safety Amplitude Cover Sturdy Metal Belt Clip And Rubber Side Railings For Maximum Handling * Five Tens Modes: Burst / Normal / Modulation / Sd1 / Sd2 * Two Ems Modes: Synchronous Alternate * System Includes Device Lead Wires Four Self-adhesive Reusable Electrodes 9-volt Battery Hard Plastic Carrying Case And Instruction Manual * Patient Compliance Meter Can Store Up To 60 Sets Of Operation Manual * Power Source: 9-volt Battery * Pulse Width: 50-300 S Adjustable * Pulse Rate: 2-150 Hz Adjustable * Pulse Ramp: 1-8 Seconds * Pulse Amplitude: 100 Ma Peak Into 500 Phm Load * Contraction Time: 2-90 Seconds * Relaxation Time: 2-90 Seconds * Wave Form: Asymmetrical Bi-phase Square Pulse * Timer: 1-60 Minutes Or Continuous * One Year Warranty