Input: 120 volt AC, Output: 0~130 volt AC, 3 Amp Slow Blow Fuse Max VA: 300VA, 3 Amp. Max (surge) A rating of 300VA means that at 100volt, the unit can sustain at maximum 3amp. If at 120 volt the unit can sustain at 2. 5amp WARNING: Most devices have a surge amperage (when first turned on) that is much higher than the device's operating amp rating. EXAMPLE: A motor with a 3 amp rating may have over 5 amp surge, and you will need a 5 amp variable transformer