TENS Massager 15 Modes Full Body Electronic Pulse Multi-functional Digital Meridian Therapy Massage Machine EMS Therapy Machine Descriptions: TENS: It is used for the symptomatic relief of chronic intractable pain and the temporary relief of pain associated with sore and aching muscles in the arm, shoudler, neck, back, waist, abdomen and leg due to strain from exercise or normal household and work activities. EMS: It is used for relaxation of muscle spasm, increase of blood flow circulation, prevention or retardation of disuse atrophy, muscle re-education, maintaining or increasing range of motion, and immediate post-surgical stimulation of calf muscles to prevent venous thrombosis. Product Specification: Output frequency: 1-120HZ Housing material: ABS Output pulse width: 100-250uS Number of channels: Two channels Output voltage: 40V+-20% Power supply: DC 4.5V 3* AAA battery(not included) Output strength: 0-40 Waveform: Bidirectional Wave Load Detection: YES Display Mode: LCD Display Mode: 15 programs Size: 119*60*16mm Usage of Electrode pad: 20-30 times (need change) WARNING: Do not use the device under any circumstance if you have a cardiac pacemaker, implanted defibrillator, or other implanted metallic or electronic device . Do not use during pregnancy . Do not use on children. Do not use on unhealthy or danmaged skin . Do not share pads - to avoid contamination . If you are in the current care of a physician, consult your physician before using this device see device instruction manual for all directions, warning and device usage. Package Included: Type A: 1 x Tens Device (Battery not included) 2 x Line 1 x Manual 4 x Electrode Pads Type B: 1 x Tens Device (Battery not included) 2 x Line 1 x Manual 4 x Electrode Pads + 4 Pairs (8pcs) Electrodes Pads Type C: 1 x Tens Device 2 x Line 1 x Manual 4 x Electrode Pads + 10 Pairs (20pcs) Electrodes Pads Type D: Only 5 Pairs(12pcs) Electrode Pads