Compact, wireless, easy to install.<br />Low power consumption, lasting one year. Free to change batteries frequently.<br />Powered by 2 pieces of AAA alkaline batteries. (Batteries are not included in the pack.)<br />Low power remind with LED indicator<br />Super loud alarm of 105dB, scare thief away<br />Magnetic sensor, door and window motion detector.<br />Keep the distance between device and magnetic shorter than 10mm, and arrow aims to each other.<br />Make sure one install in door/window, another one install in door/window frame, that to let them separate when the door/window is opening.<br />Material: Plastic<br />Color: White  <br />Alarm Volume: 105dB<br />Batteries: 2x AAA batteries for main unit (batteries not included)<br />Operating Temperature: From -10 to 60 deg C<br />Working Humidity: <80%<br />Main Part Size (L x W x H): Approx. 3.3 x 1.6 x 0.5 inch<br />Weight: 60g<br />1 x Main device<br />1 x Remote control ( with button battery )<br />1 x Door magnetic<br />In blister package<br /><img src="http://img6.eachbuyer.com/x22/p96/bt214_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x22/p96/bt214_4.jpg" />