Transcutaneous Electrical Nerve Stimulation (TENS), designed for symptomatic relief and management of chronic intractable pain. TENS is a safe non-invasive drug-free method of pain management. "Transcutaneous" means across the skin. It relieves pain by sending tiny electrical impulses through electrodes placed on or near the area of pain or pressure point to underlying nerve.Electronic Muscle Stimulation (EMS) is an advanced muscle exercise muscle toning technique that is an efficiently and effectively supplement to your workout routine. Our EMS units are portable, lightweight and battery-powered electronic units. EMS units are designed to exercise body muscles by applying a chosen intensity and frequency of electrical current repeatedly in a series of stimulated contraction and relaxation phases.Specifications:Channel Dual, isolated between channelsPulse Amplitude 0-80mA into 500 ohm loadPulse Rate Adjustable, from 1Hz - 160 Hz, 1 Hz/ step (1 - 20Hz), 5Hz/ step (20 - 160Hz)Pulse Width TENS: 10 μS/step from 50 μS ~ 260 μS adjustable, EMS: 250 μS fixedMode TENS: B/ C/ M/ SDR/ SDW, EMS: S/ C/ AON time (EMS) 1 - 30 sec adjustableRamp time (EMS) 1 - 8 sec adjustableOFF time (EMS) 1 - 30 sec adjustableWave Form Asymmetrical Bi-Phasic Square PulseTimer 15, 30, 60 minute or continuePower Source DC 9V batteryOutput ModeB: Cycle BurstsM: Modulated WidthSDR:Strength-Duration and Rate modulationSDW:Strength-Duration and Width modulationS: SynchronousC: Continuous modeA: AlternationInside the box1. GM320TE main unit2. Instruction Manual3. Self-adhesive Electrodes4. 9V Battery5. Lead Wires6. Carring Case