The new TENS TX-2M is an economical, easy-to-use, dual channel constant current TENS. Features 3 frequency settings: (C) continuous adjustable frequency from 2 to 120 Hz, (M) pulse width modulation, and (B) burst mode. Includes self adhesive electrodes (1.5" x 1.5") with wires, carrying case, belt clip, 9 volt battery, and instructions. Replaces the former TX-5M unit. Specifications.