Inspired by demands for an affordable yet user-conscious pain relief device, Bio Protech proudly launches their TENS Unit. User driven, these units feature a wide array of output combinations to help get the settings just right . With times ranging from 15 or 30 minutes to continuous mode, user can pick the setting that's right for them. They also feature three modes B Burst , N Normal , and M Modulation . The pulse rate, pulse width, and amplitude are adjustable to lessen acute pains due to an accident or chronic conditions such as arthritis or other joint and muscle conditions. Those who prefer an alternative to invasive medical procedures or high cost drugs, this may be the helfful for you. Features Fully adjustable. Convenience Sturdy construction with an attractive appearance. Protective cover to guard against accidental setting changes. Zero Start Feature Shock Prevention . Specifications Channel Dual Amplitude Adjustable, 0-80mA peak into 500 ohm load each channel Pulse Rate Adjustable, 1 150 Hz Pulse Width Adjustable, 50 250 us Mode B Burst mode N Normal constant mode M Modulation mode Wave Form Asymmetrical biphasic pulse Timer 15, 30, 60, 90 continue Power Supply 9V Battery Size 105 H x 70 W x 24 T mm Weight 121g battery included Includes TENS Unit Four 4 TENS Electrode Two 2 Leadwires 9V Battery, type 6F22 Instruction Manual Carrying Case 1 Each / Each