Note: The Tens 7000tm Is Now Fda Cleared For Over-the-counter (otc) Purchase!  The Tens 7000tm 2nd Edition Is The Best Valued Digital Tens Unit On The Market Today. Proven To Be The Most Durable And Easy-to-use Tens Unit. The Upgraded Digital Processor Is Accurate And Precise  The Preferred Doctor's Choice For Effective Pain Relief. System Includes: Tens 7000tm Device  One (1) Pair Of Lead Wires  Four Self-adhesive Reusable Electrodes  9v Battery  Hard Plastic Carrying Case  Quick Start Guide And Instruction Manual Compliance Meter: Stores 60 Records Up To 999 Hours Power Source: 9-volt Battery Modes: Burst  Modulation  Constant  Mrw  Sd1 And Sd2 Channels: Dual Channel For Use With Two Or Four Electrodes Timer: Variable 5 - 60 Minutes Or Continuous. Auto Shutoff 100 Ma Output Pulse Rate: 2 - 150 Hz  Adjustable One Year Warranty