Hikvision Wireless external sounder

* 868 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 * Fully remote configurable through App * Multiple enrollment methods and easy installation design * Frequency hopping against jamming for reliable transmission * IP65 protective level