Portable Dual-Channel TENS&EMS Device Pulse Massager Muscle Stimulator Unit 12 Massage Modes 40

Specification: Material: ABS Channel quantity: 2 Power supply: DC 4.5V 3 * AAA battery (Not included) Waveform: Bidirectional wave Display mode: LCD display Mode: 12 modes Strength levels: 0-40 Output frequency: 1~120Hz Output pulse width: 100~250uS Output voltage: 40V+/-20percent Operating temperature: 5 celsius ~40 celsius (41 Fahrenheit ~104 Fahrenheit ) Operating humidity: 15percent RH to 93percent RH Storage temperature: -25 celsius ~70 celsius (-13 Fahrenheit ~158 Fahrenheit ) Storage humidity: 15percent RH to 93percent RH Item size: 137* 67* 20mm/ 5.39* 2.64* 0.79in Item weight: 74.4g/ 2.62oz (Only the host) Packing list: 1 * TENS & EMS Device 4 * Electrode Pads 2 * Electrode Cables 1 * User manual