INPUT: 3 phase 50/60 hertz 380/460 volt 10 amp and OUTPUT:5-120 hertz 0-460 volts 8.0 amps. Cat. No. L905. Part No.9-500308-00.Black wall mounting brackets show no signs of prior bolt/washer marks - never installed? Cabinet shows some very minor scratches but no cracks and no broken parts.From left to right Hertz needle gauge 0-50 and 0-60 / Frequency Adjustment knob / Forward or Reverse toggle switch / Stop-Reset-RUN toggle switch.No way to test. SOLD "as is" with NO RETURNS and NO REFUNDS.MFG NO S5HA2 72C -C Some other numbers on unit face label: 501636-01 and NE12037 and 501637 and NE62233 and 501638 and NE12036.S&H in the contiguious USA $20. (insured shipping). Please see other interesting items by JGrit.USPS DELIVERY TIME: As stated in the item listing, seller will drop-off your item to the USPS within 4 days of receiving cleared payment. How long it takes to deliver to your door is strictly within USPS control and not within the control of seller. Please leave 5 stars for seller 4 day drop-off time. Thankyou.