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wireless siren main features:
1) wireless siren , open distance 100m to the alarm host2) flash light when alarm3) 110V-240VAC input
4) wireless emitter can be connected to all kinds of keypad5) alarm sound level more than 80db
6) size: 16cm*8cm*4cm
7)weight: 0.2kg
8)wireless frequency: 315/433M
wireless flash siren (indoor use)