... 9V battery 2.Low power alarm 3. CE/RoHS Approved Standalone smoke alarm CE/RoHS approved The detector is suitable for ... , office building, school, bank, library, computer house and storehouse etc.Standalone surface mounted, easy operateBuilt-in IC card, stable performance, high ... 34MMThis detector has no wireless transmitter module, it is a standalone smoke detector fire alarm, it will NOT react or pair ...