Smoke detector, 230V, 50Hz, with emergency power supply via replaceable 9 volt lithium battery (included), photo-electronic. Mains-operated smoke detector with loud 85dB(A) warning tone, LED operating display, test button and acoustic battery warning. Up to 40 devices can be networked. Mute via button. Tested according to EN 14604 (corresponds to the requirements of DIN 14676). Incl. base for quick installation and protective cover. Dimensions: D 122 x 50mm. Suitable accessories: Base with relay module CB700 for switching external alarm devices and reporting devices.