Features: Safeguards your property with our Wireless Door Sensor Alarm Magnetic Transmitter. Enjoy a wide coverage of 400 feet to stay informes about any visitor arrival. Designed for the convenience of those with hearing impairments and the elderly, our LED light alerts provide clear visibility at night. Perfect for homeowners and office managers looking to expand their existing wireless doorbell system. Effortlessly install our Wireless Door Sensor Alarm for reliable detection and peace ofmind in your home or office. Specifications: Material: plastic Size: approx 7x3.5x1.4cm/2.8x1.4x0.6inch Working voltage: DC12V23A Staticcurrent: ≤10uA Alarm voltage: ≤15mA Operating frequency: 351/433MhHz Operating temperature: 10-50℃ Launchs distance: 50-100m Package Includes: 1xDoor Magnetic Detectors note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.