The Dahua DHI-ARA13-W2 (868 MHz) Wireless Indoor Siren provides loud, reliable alerts for alarm events, including intrusion, fire, and other danger warnings. Featuring two-way wireless communication, frequency hopping, and AES128 encryption, it ensures stable, secure operation. With cloud updates, tamper detection, and low battery alarm, this siren is ideal for villas, apartments, shops, and other indoor spaces.