Features: and high quality The shell is made of ABS material, which is wear-resistant and durable, and not easy to damage Sealed design, dustproof and waterproof, ensuring signal continuity even when exposed to water Strong adsorption force, with the magnet end made of strong magnetic potting for increased sensor sensitivity Lightweight, easy to install, and highly concealed Suitable for wooden doors, glass doors, and plastic doors Package Includes: 1 Set Window Sensor Specifications: Material: Plastic Length: Approx. 64mm / 2.51inch Style: Normally Closed / Normally Open Detection Angle: 360 degrees Detection Distance: 20-30m / 65.62-98.43ft Transmitting Frequency: 315 / 433MHz Working Voltage: 100V Quiescent Current: 0.5μA Alarm Current: 15mA Working Temperature: -10°C to 60°C Note: 1. Please allow 1-2cm errors due to manual measurement; ensure you are comfortable with this before ordering 2. Due to differences between monitor displays, the picture may not reflect the actual color of the item