Wireless Indoor Sounder

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868MHz two-way Tri-X wireless technology; Frequency hooping against jamming for reliable transmission; RF Range: 1,600m(open space); Buzzer Decibel: 90 to 110dB; Configurable arming/disarming prompt sound and LED indicator 3 kinds of alarm sounds: fire alarm, panic alarm, and intrusion alarm Fully remote configurable through APP; Tamper Switch Battery Type: 3 * CR123A batteries (included by default, easy replaceable) Battery Life: 3 years(triggered once every two weeks and alerting 90s for each triggering)