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Features:OOTDTY brand new and excessive qualityThe for shell is manufactured from ABS material, which is wear-resistant and durable, and is not clean to damage.Sealed design, dustproof and waterproof, even though the door is within the water, the need not be interrupted.Strong adsorption force, the magnet end is made from solid potting to make the more sensitiveLight weight, easy to install, solid concealment.Suitable for wood door/glass door/plastic door.Specifications:Material: PlasticLength: Approx. 64mm/2.51inch/DetectionDetection Distance: 20-30m/65.62-98.43ftTransmitting Frequency: 315/433mhzWorkingQuiescent Current: 0.5uaAlarm Current: 15maWorking Temperature: -10~60℃Package Includes:1 Set WindowNote:1.Please enable 1-2cm errors because of manual measurement, just remember to don't intellect before you order.2.Due to the variation between diverse monitors, the image might not reflect the particular coloration of the item.