Specification BrandDIGOOModelDigoo DG ROSA 433MHz Wireless DIY Standalone Alarm SirenMulti Function Home Security Alarm Systems HostSiren set Size8cm x 3 1cm 3 15 x 1 22 ColorBlueWhiteFunctionCan work as a Standalone Alarm Host or Wireless Siren Alarm Both Voice Prompts and Quick Flash StrobeWireless Learning CodeOne Key Control FunctionRemote Control to Arm Disarm Emergency AlarmLearning Storage Location Support up to 20 learning Storage Location for Wireless Defensing ZonesDetectors and 5 Wireless Remote ControllersPower OutputDC5V 1000mAStandby Current≤ 13mAAlarm Current≤ 230mADecibel100dBWireless Frequency433MHzCodeSC 2262 IC Temperature 20℃ 55℃Humidity40 80 RHBuilt in Backup BatteryLithium ion Battery 3 7V 280mANote The product does not have a logo due to the production batch and the actual function and quality are the same Feature Not a just simple wireless siren But also can be a Standalone Alarm System Host Support up to 20 wireless detectors and 5 wireless remote controllers Alarm both loud voice prompts and quick flash strobe more deterrent to illegal intruders Wireless 433Mhz learning code convenient safe and efficient to adding new accessories Easy to install and setup match the remote controller you ll have your own security alarm system running in no time Package Includes 1 x Digoo DG ROSA 433MHz Wireless Alarm System Siren Host Digoo Customized Flash Light Blue Red quick flashing suit for both indooroutdoor viewing