Look no further. Great product quality， that's solidly built. Best of all， its very affordable price. Buy today. <br /><br />Material: ABS <br />Color: black <br />Dimension: 85mm x 42mm x 17mm (LxWxH) <br />Operating voltage: 3V AAA x 2 (not included) <br />Standby current: 100μA <br />Alarm current: 30mA <br />Working frequency: 433MHZ<br />Alarm response time: 200MS <br />Static standby time: 8-12 months， related to the nature and quality of battery  <br />1 x Alarm <br />1 x Doorbell sticker <br />1 x English manual <br />In paper box<br /><img src="http://img6.eachbuyer.com/x9/p100/eb4114_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4114_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4114_3.jpg" />