Check the listing for details. 3x Wireless Anti-Theft Remote Control Door Window Security Alarm Magnetic Sensor. Color: White, Condition: New, Made in China. Listed at 31.98 USD. Features: 1. Easy and convenient to install. 2. Professional design, quick and sensitive response. 3. Immediately alarm while thieves pushing the door or window. 4. Suitable use at home, in office, in shop, etc. 5. One magnetic sensor can match with at most 8 remote controllers freely. 6. One remote controller could control several magnetic sensors. Magnetic Sensor: 1. Volume: 110dB 2. Color: White 3. Weight: 2.29oz / 65g 4. Material: ABS 5. Power Supply: 2 x AAA Batteries(not included) 6. Alarm Response Time: 200ms 7. Standby Time: 12 Months Remote Control: 1. Voltage: 12V 27A 2. Standby Current: 1uA 3. Working Current: 15mA 4. Standby Time: 12 Months 5. Remote Control Distance: 20m.