This Cyberpower power supply battery back-up ensures uninterrupted power supply for your BT digital voice service. With a nominal voltage rating (AC) of 100-240V, this power supply has a plug type of Type G and a nominal power rating of 24W. It has a nominal capacity of 7.2Ah and a backup time of at least 1 hour. This power supply is designed for indoor installation and has one output. It comes in black colour and is manufactured by CyberPower. The model number is 091297 and it has lightning/surge protection properties. With an output voltage rating (DC) of 12V and an efficiency of 76%, this power supply is perfect for maintaining reliable power supply for your BT digital voice service.