2VOICE, two wires throughout the system for quick and easy installation. Maximum flexibility: from single-family homes to larger building complexes.Product features:Video BUS power supply for max. 128 devices with a riser for DIN rail mounting Short-circuit proofTechnical data:Compatible with System 2VOICESupply voltage: 110/230V (AC), 50-60Hz Output voltage: 48V (DC) Width: 10 sub-units (180mm) Installation instructions:Note: