Hikvision DS-PS1-I-WE Wireless internal sounder

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 sec 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
Electrical characteristics
Operation humidity10% to 90% (no condensing)
Operation temperature-10 °C to 55 °C (14 °F to 131 °F)
Battery life spanUp to 3 years (standby time)
Wireless transmission
RF frequency868 MHz
RF modulation2GFSK
RF distance1.6 km (open area)