Items electrical requirements are 115v AC , 60hz, 5w; frequency8.9khzto9.1khz or 10.9khz to 11.1khz; pulse width is 9.9msec to 10.1ms; modulation frequencies range 62.6hz to 156.9hz; output 10v with 470 ohm; demension are 16.63 length; 8.31 width; 3.88 height