interlinkable smoke detector interlinkable smoke alarm

Interconnected smoke detector  DP-428   Note: we also have the imported battery with 10 years life, if need, please contact me directly.   Description:        This detector has been design with both transmitter and receiver in the electronics.  Detectors could be wireless interlinkable with each other. Once one unit alarms, it will send alarm signal to trigger the other alarms.       It has a DIP switch for setting the detectors ID to avoid receiving other similar alarm signals.   Only detectors with the same ID can make up an interconnection group.       Features:       * Infrared photoelectric sensor     * MCU processing   * Auto-reset after smoke clears   * Sound & flash alarm   * LED indicator   * Test & Hush button   * Low battery indication   * Dustproof, mothproof and anti-white light design        Specifications:        

Model:	DP-05I
Color:	White
Operating voltage:	AC220V or 110V + 9V backup battery
Static current:	<10uA
Alarm current:	<35mA
Alarm indication:	LED indicator flashes Red
Alarm sound:	≥85dB/3m
Operating temperature:	-10°C ~ +50°C
Humidity:	≤95%RH
Wireless interconnection frequency:	433MHz
Wireless transmitting distance	200m (open area)
Detecting area:	80m² at 6-12m installation height
	60m² at installation height <6m
Unit Size:	107X44mm

    Here is a link on google which shows how the interconnected smoke detectors work. you can interconnect 
how many pieces of smoke detectors you want in one group. if one alarms, the others in this group will alarm.   https://plus.google.com/photos/100905604966827188163/albums/6085892197005564417/6085892209121895922?pid=6085892209121895922&oid=100905604966827188163