You can also check DIGOO DG-HOSA 433MHz Wireless Remote Controller,For HOSA Alarm System,Window Door Sensor,PIR Detector,External Alert Siren Set,and Other Accessories,White and Digoo DG-ROSA 433MHz Wireless DIY Standalone Alarm Siren Multi-function alarm Host & Siren Set for home security&surveillance for a better comparison at Homesecurities.net.

Features: adopted detected theory of once detects vibration, send the control alarm. needs to work with host, can't protects 24 to prevent strike, saw entering door, window ceiling so Popular used for window, door, guard box, ATM, box, ceiling, file door and With sensitive guarantees using life Long life, rate ratio, effectively false alarm.
SPECIFICATION: Power Alkaline A23.
DC 2.Max current: 3.Pulse 5. battery Low battery LED on it lower 6.
MHz 7. ≥100m; about 30~50 m 8. temperature: indoor related ≤ 9.Chip: 1527,330k Included: 1 Wireless (1pcs of alkaline.
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