Dahua ARA12-W2 Wireless Siren in-store When you choose 30MHz channel

When you choose 30MHz channel bandwidth option

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Dahua ARA12-W2 Wireless Siren in-store When you choose 30MHz channelDescription Dahua ARA12 W2 Wireless siren Wireless siren that gives a loud signal when an alarm event occurs. Siren features danger warning and intrusion determent. Mainly applied for villas, shops, apartments, etc. Signal strength detection. Low battery alarm. Temperature measurement. Frequency hopping function and two way communication technology ensure communication stability. Cloud update and automatic recovery from update failure. Port Indicator