TENS & EMS Muscle Stimulator with 28 Modes, Dual Channel Muscle Stimulator Machine with 8PCS Electrode Pads, for Muscle Relief, Shoulder, Neck, Back, New Upgraded Color Screen Multi bee09 Each of their function is

Each of their function is different

Adjustable You can adjust the mirror up and down in the slot of the bracket to find the right angle

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TENS & EMS Muscle Stimulator with 28 Modes, Dual Channel Muscle Stimulator Machine with 8PCS Electrode Pads, for Muscle Relief, Shoulder, Neck, Back, New Upgraded Color Screen Multi bee09 Each of their function isTENS & EMS Muscle Stimulator with 28 Modes, Dual Channel Muscle Stimulator Machine with 8PCS Electrode Pads, for Muscle Relief, Shoulder, Neck, Back, New Upgraded Color Screen Product Features 3 IN 1 Tens Unit Muscle Stimulator DeviceGOBOK muscle stimulator device combines TENS, EMS, and MASSAGER to provide a safe and efficient muscle stimulation without the use of drugs, to achieve the improvement and promotion of muscle performance. Independent A B