Wireless External Siren

DS-PS1-E-WB 433 MHz two-way wireless communication 3 years battery life span (triggered every two weeks and alerting 90 s for each triggering) AES-128 encryption Front and rear panel tamper-proof 3 kinds of alarm sounds: fire alarm, panic alarm, and intrusion alarm Buzzer Decibel: 110 dB like other wired alarms Bosch / Hills / Ness. Fully remote configurable through App Multiple enrollment methods and easy installation design Frequency hopping against jamming for reliable transmission IP65 protective level