... and EN54-24 Certificated Voice Evacuation System Class D amplifier for voice alarm system, 120W to ... enabled when no signal input is detected. AC 110V or 230V power supply and DC 24V ... on, overheat, short circuit and overload.Features* Class-D power amplifier for voice evacuation system* 120W, 240W, ... for each channel ModelVA-P120/P240/P350/P500 AC PowerPower220V AC, ±10%, 50/60HzMax Working Current0.7A, ...