The wireless internal sounder, supporting 868 Mhz wireless communication, Tri-X wireless protocol, multiple enrollment methods, two-way wireless communication, multiple alarm sounds, and strobe light indication, is used for instant alarm alerting.

Key features:

868 MHz two-way wireless communication
Configurable arming/disarming prompt sound and LED indicator
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: 90 to 110 dB
Fully remote configurable through App
Multiple enrollment methods and easy installation design
Frequency hopping against jamming for reliable transmission