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Working Voltage : DC 2.3 – 3.3v Battery Spec : CR1220 Standby Current : ≤2uA MAX. Current : ≤5mA & Time of duration ≤ 35ms Battery life : 1-2 year ( japan ) unlock 30-50 times one day Operating Temp : -5°C to 50°C Relative humidity : 20% to 80% Material : Zinc alloy/ABS Diameter of mounting : Apply to diameter 16mm-20mm Thickness of plank : Steel = 0.5-12mm / Timber = 0.5-22mm
Alarm will set off for 30 seconds after 3 wrong entry of the passcode