All needed accessories: Multi-day self- adhesive electrodes - 3 packs of 4 electrodes (12 TOTAL!), 1 battery (9 Volt), Lead wires, A chart and written directions on where and how to use the unit and where to place the electrode pads. A hard plastic carrying case. BASIC FEATURES: Dual channel with independent amplitude controls. (Each channel connects to a wire that splits for 2 pad attachment.) Pulse rate control 2 - 120 Hz, Pulse width control 40 - 160 uS,Size: 23 x 64 x 91 mm, Weight: 130 grams, Battery Life ~ 100 hrs at normal setting, Voltage: 1-110 Volt, includes 3 packs of 4 electrodes (12 total). VITAL TENS $49.95 - Dual Channel four pad Tens unit with single continuous mode. Adjustable pulse rate and pulse width. Includes Case, Lead Wires, Battery, 3 packages of 4 electrodes (12 pads), Manual and Instructions. Doctor's Prescription REQUIRED for this item. Please fax to (888) 280-0299. VITAL TENS DELUXE $79.95 - Dual Channel four pad Tens unit with TIMER (30 min, 60 min and continuous) and three modes (Burst, Modulation, Continuous). Adjustable pulse rate and pulse width. Includes Case, Lead Wires, Battery, 3 packages of 4 electrodes (12 pads), Manual and Instructions. Doctor's Prescription REQUIRED for this item. Please fax to (888) 280-0299. 1 year limited warranty Doctor's Prescription REQUIRED for this item. Please fax to (888) 280-0299 ELECTRODES, PADS, WIRES, GEL - CLICK HERE VITAL TENS Pain Control Unit TN01$49.95Choose: VITAL TENSVITAL TENS DELUXE (+30) We offer a 30-Day Guarantee on all our products!