BioMed 2000XL Analog TENS Device With Timer. New ergonomically designed device has adjustable pulse rate and pulse width, and has three modes of operation; constant, width modulation, and burst. The new design of the device incorporates a sliding amplitude control cover for safety, and a permanently attached 9 volt battery cover to prevent loss. The 9 volt battery compartment has been redesigned for simple insertion and removal of the battery. To provide comfort while wearing, the belt clip has been positioned horizontally. Device comes with lead wires, electrodes (4), battery, instruction booklet and carrying case.