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Reed Switch, Trigger Distance Wooden door: 25mm±5mm, Iron door: 15mm±5mm, Low Battery Reminder, Tamper Alarm, Protocol ZigBee 3.0,Wireless Frequency 2.4 GHz,Communication Distance > 250m (open environment), Operation Conditions -10°C ~ 55°C ( 14°F to 131 °F ), Humidity 95% or less (non-condensing),Operating Voltage DC 3V, Working Current Static State≤10μA, Up to 25mA, Main body: 53.5mm × 22.5mm × 13.5mm(2.1” x 0.9” x 0.5”),
Magnet: 32mm × 10.5mm × 13.5mm(1.2” x 0.4” x 0.5”), Suttle Weight (g/lb) 21g (0.4oz)
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