1.  One Magnetic Sensor can match with at most 8 remote controllers freely.          <br />2.  One remote controller could control several magnetic sensors;<br />3.  Excellent Home use product，Tiny and fashion;<br />4.  Volume: 110DB;<br />5.  Alarm and door bell function for your option;<br />6.  Low energy and long work time;<br />7.  Simple install; <br /><br />Specifications of Magnetic Sensor:<br /><br />Voltage: 3V   AAA*2pcs<br />Stand-by Volume: 100μA<br />Alarm volume: 30mA<br />Frequency: 433MHZ<br />Alarm response time: 200ms<br />Stand-by time: 8-12 months<br /><br />Specifications of Remote control<br />Voltage: 12   12V27A*1pcs<br />Stand-by Volume: 1μA<br />Working volume: 15MA<br />Stand-by time: 8-24onths<br />Remote control distance: 20m<br /><br />NOTES:<br />Please make sure the arrow of the magnetic align the Magnetic Stick， magnetic stick stripe on the right side of the magnetic sensor， when the door is closed， the distance between magnetic sensor and magnetic stick should less than10 mm.<br />Only use in indoor， banned in outdoor use.<br />Working environment temperature: -10 ~ 60 ° C<br />Working environment humidity: < 80%<br />Storage temperature: -20 ° C - + 70 ° C<br /><img src="http://img6.eachbuyer.com/x9/p100/cq453_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq453_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq453_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq453_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq453_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq453_6.jpg" />