Wireless sound and both sides of double-flash light Siren MD-334R with built-in antenna and 120dB louder.
Sirène extérieure, configuration alarme

Security safe accessories wireless siren strobe
1.It can work with control panel or work with remote, or work with wireless detectors independently. 
2.It is both sides of flash lighting and built-in dual tweeter. 
3.It can make promote sound when the panel is armed or disarmed. 
4.It is tamper-resistant. 
5.It can code with Max. 16 wireless device. 
6.Power supply: DC15-18V (with 220VAC power adaptor)
7.Backup battery:12V 
8.Standby current:9.Electric Current: 10.Frequency:433MHz
11.Wireless communication distance: 200m