Tens Unit Dual Channel 3 Mode w Timer Corded Massagers 1 kg 1334 N) * Selectable Color:Yellow 1 kg 1334 N) * Selectable test time from 1 10 seconds * Tone to indicate start stop and entering within a range * Microprocessor controlled * Built in stored data browsing capability * Easy to read graphical LCD display * Automatic shutoff after 5 minutes of inactivity * Battery indicator on LCD display * Interactive menus allowing users to select device options * Battery powered: (1) rechargeable lithium ion battery * Knee Hi * Expresso * 30 40 mmHg * Small * Ankle Circ 7 8 System includes device lead wires four self adhesive reusable electrodes 9V battery hard plastic carrying case and instruction manual * 3 Modes: Standard Modulate and Burst * Dual Channel * 30 and 60 minutes or continuous timer * Adjustable Pulse Width: 50 250 Microseconds * Pulse Rate: 2 150 Hz * Pulse Amplitude: 0 80 mA each channel * Waveform: Asymmetrical biphasic square pulse * One year warranty * FDA approved