3-in-1 Machine for Pain Relief Relief: The 36 Mode Muscle Stimulator combines 3 therapies in 1 device. TENS provides safe, non-invasive, drug-free pain relief; EMS helps activate muscles and can be used as a training tool to help increase strength and endurance; and massage helps relax the body, relieve fatigue, and improve sleep. 3-in-1 Pain Relief TENS Machine. The 3-in-1 TENS, EMS, MASSAGE machine is an excellent choice for shoulder pain, lumbar pain, and back pain relief. This muscle stimulator activates a specific natural pain gate mechanism and relaxes your body. TENS offers pain relief in a non-invasive and drug-free way. EMS improves muscle performance. MASSAGE helps relax your body and dispel fatigue. A/B Dual Channels. 36 Modes and 20 intensities are included in a little TENS Unit with an A/B channel which can offer the relief option of 2 or 4 pads at the same time. This portable stim machine can be used in home, office, or traveling. The treatment of this home TENS Unit is the same as physical therapy offices' muscle stimulator. More effective pain relief than other TENS/EMS units. The independent channels A/B can work in different modes and at different intensity levels (e.g. in channel A you can select mode 7 with intensity 3 for the shoulders, while in channel B you can select mode 25 with intensity 5 for the back). Powerful battery: The package includes a USB cable that connects to a wall charger, mobile power supply or laptop USB port for charging. With up to 20 hours of use on a single charge, it is more environmentally friendly than AA batteries and lasts longer than other machines. Our Tens units come with a power indicator to remind you to recharge! Product Accessories 1*Main unit 1 pair*Palm-shaped patches 1 pair*Oval shaped patches 2 *Electrode lead wires 1pc*power charger 1pc*USB cable 1*Wire Wrap (tool for placing patches and wires after massage) 1*Neutral Instruction Manual (English) 1 * meridian chart Specification: Modes: 36 modes Output pulse channels: 2 channels Intensity level: 20 levels Timer: 10-60 minutes Power supply: USB rechargeable (built-in rechargeable battery) Main unit size: 9.5 x 5.5 x 1 cm. Screen type: LED screen. Case color: Black