Model 34930. 120V. 30Amp. 2450 joules power protection. This is the best performing surge protector available. Faulty wiring in RV parks are a reality, often resulting in expensive damage to RV's or injury to occupants. Plug this unit into the RV power supply and wait a few seconds. It will analyze the quality of the supply incl. correct polarity, true voltage level etc. then display the results. Then plug your RV cable into the unit and forget about any possible damage to your RV/injury etc. for the rest of your stay. This cost me over $500; (it's the best available!). Excellent condition.