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Features: OOTDTY  ; brand new and wonderful The for shell is fabricated from ABS material, which is wear-resistant and durable, and isn't easy to damage. Sealed design, dustproof and waterproof, even if the door is within the water, the will no longer be interrupted. Strong adsorption force, the magnet end is manufactured from stable potting to make the extra sensitive Light weight, clean to install, solid concealment. Suitable for wood door/glass door/plastic door. Specifications: Material: Plastic Length: Approx. 64mm/2.51inch / Detection Detection Distance: 20-30m/65.62-98.43ft Transmitting Frequency: 315/433mhz Working Quiescent Current: 0.5ua Alarm Current: 15ma Working Temperature: -10~60℃ Package Includes: 1 Set Window Note: 1.Please enable 1-2cm errors due to handbook measurement, make sure that you do not intellect before you order. 2.Due to the difference between various monitors, the image may not replicate the actual colour of the item.