*Interlinked connection to establish max.24 alarms' network
*High sensitivity photoelectric infrared smoke sensor*Low power consumption long usage life
*Wireless 433MHz or 868MHz interconnection
*Big self-test and hush button, easy to operate
*3 year replaceable/Sealed 5 year/10 year lithium battery optional
*Low battery warning at 2.6V±0.1V
*Remote controller as option
*One mutes, all interconnected alarms mute
*High decibel volume at 85dB/3meters
*Dust-proof design prevent false alarm
*EN14604 certified by TUV