Please tell me what's your alarm system model before order, thanks
Features:
1. Combine the siren with flash together (ringing and flashing)
2. Operating power: 110-240V
3. Can send out 110db (+3db or -3db) audio alarm and flash built-in LED when the system alarms
4. No Flash and no Light on standby status
5. Frequency: 433Mhz
6. Suitable for indoor use.
8. Built-in Antenna
This wireless flash siren and the wired siren can't be used at the same time.
Can connect with Alarm System
Can connect with PIR, door contacts
Suitable for indoor
110dB Sound
