The convenience in this case is given by the multiplug socket to connect up to 4 devices, also ideal for a 4-camera system with DVR where instead of the 4 power supplies present you can use only one to feed the whole kit, saving space. General technical characteristics: Input voltage: 100 - 240 volts ~ 50/60 Hz Output voltage: 12V - 6A 4 Jack 5x2.1 mm 4 Plug out. Cable length: 90cm The package contains: N. 1 power supply with 4 plugs N. 1 electrical connection cable