This power supply provides safe and reliable operation for 1 spectrum tube. The unique design supplies a voltage that prolongs the life of the spectrum tubes. Specially designed sockets eliminate electrical shock hazards. The unit operates at 120V @ 60Hz. (Tube not included). Output Voltage: 5000V without spectrum tube. 1000V @ 10mA w/ spectrum tube. 13 3/4" (H) x 4 5/8" (W) x 3 1/2" (D). 10.00 lbs.