Multitester tested for voltage. This is a voltage EQUIVALENT adapter with the following specs: AC input: 120V output: AC 24V 1.25A (aka: 24VAC 1250mA). Amperage can be higher, but never lower. Barrel plug with a hollow center. Please determine compatibility before purchase. Shape, size or color may differ from photo. Special heavy wrapping is needed to protect the prongs. S&H in the contiguous ...