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