*  No host,all alarms quickly achieve interconnection

*  .It contains a highly sensitive photoelectric smoke sensor,response quickly when

excessive smoke have been detected

*  Remote control to   interconnect all alarms quickly

*  Powered by 3years replaceable DC 3V AA alkaline or 10 years built-in lithium battery

*  The alarm volume is higher than 85 dB /3M,enough to wake you up when the danger comes

*  The Radio-frequency is 433 MHz

*  A variety of LED indications ensure normal operating

*  EN14604：2005 /BS5446-2:2003 certified product standards