DS-PS1-I-WB Wireless Internal Sounder Black

 433 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