The Speedotron D802B is an effective power supply for studio portraits and a secondary power supply for large light setups.It is of compact size and weighs about 12 lbs, which adds comfort while carrying it to various locationsThis Speedotron power supply recycles 800 watts in just 3 secondsThe circuit breaker ensures safe and trouble-free operation of this power supplyIt operates at a voltage of 105-125V, and has synchronizing voltage of 45 microampsThis power supply has a dimension of 7.9" X 5.6" X 7.3" (W X D X H)