[Dual Channel in TENS Machines: You can set separate modes and intensities for channel A and channel B of the TENS unit. The last memory function of the TENS muscle relaxer will remember your preference for mode settings. Relax your body and relieve general pain anytime with an electric muscle stimulator. High-Performance Muscle Stimulator: Electrodes muscle stimulator helps relieve pain associated with sore and aching muscles in the shoulder waist back neck upper extremities (arm) and lower extremities(leg) due to strain from exercise or normal household work activities with TENS. A cramp simulator can also stimulate healthy muscles. TENS Muscle Relaxer Up to 24 Modes: The period cramp simulator machine comes with 24 pre-programmed massage modes. The modes 1&2 of the electrodes muscle stimulator a stable pulse modes which not fade in and out perfect to use when doing household work. The TENS units for pain relief can excite and stimulate the muscles. Rechargeable TENS Unit Muscle Stimulator: This STIM machine for muscle recovery is lightweight and compact and is perfect also for traveling everywhere. The rechargeable battery of the muscle stimulator ensures you have pain relief for 20 hours wherever you need it. 10 High-quality Pads of TENS: TENS units for pain relief include 10 reusable electrode pads of varying sizes providing versatility and comfort for targeted relief on multiple muscle groups. TENS machines can be used for all muscle soreness and trouble areas like the neck back abs shoulder knee arms and legs. Lightweight and compact this device is perfect for travel. The rechargeable battery ensures you have pain relief wherever you need it]