Each unit comes with a carrying case, set of four V-Trode™ self-adhesive electrodes, 9V battery and instruction manual.

Mettler TENS 210 and 210T Specification:
Channels:             Dual
Waveform:            Asymmetrical Bi-Phasic Square Wave
Output Current:    0-100V constant
Intensity:                0-800Ma
Modes:                   Continuous, Burst and Modulated
Pulse Rate:           2-150 Hz
Pulse Width:         30-260 microseconds (210T: 30 OR 60 minutes)