DC12V (network type), 9V battery (independence or wireless type)<br><B>Sound level:</B> More than 85dB/m (independence or wireless type)<br><B>Operating temperature:</B> -10Deg - +50Deg<br><B>Datecting area:</B> 20 square meters                 <strong>Color:</strong> White <br />             <strong>Touch screen:</strong> No <br />             <strong>Usage:</strong> Home use <br />             <strong>Weight:</strong> 101g-150g                                            <strong>Package weight:</strong> 0.202 kg <br />             <strong>Product Size(L x W x H):</strong> 10.00 x 5.00 x 11.50 cm / 3.94 x 1.97 x 4.53 inches <br />             <strong>Package Size(L x W x H):</strong> 10.50 x 5.50 x 11.50 cm / 4.13 x 2.17 x 4.53 inches                               <strong>Package Contents:</strong> 1 x Alarm Detector, 2 x Screws                                                     Product Safety Disclaimer: <br />We do not accept any responsibility or liability for misuse of this or any other product.  All our products are extensively tested to comply with rigorous and strict QC standards.  For certain products (e.g. toys, knives, etc.), we recommend proper supervision as we cannot be held liable for misuse or accidents.                             <p><img src="http://des.chinabrands.com/uploads/pdm-desc-pic/Distribution/image/2016/04/13/1460539519323654.jpg" style="" title="1460539519323654.jpg"/></p><p><img src="http://des.chinabrands.com/uploads/pdm-desc-pic/Distribution/image/2016/04/13/1460539522763872.jpg" style="" title="1460539522763872.jpg"/></p><p><img src="http://des.chinabrands.com/uploads/pdm-desc-pic/Distribution/image/2016/04/13/1460539521480341.jpg" style="" title="1460539521480341.jpg"/></p><p><img src="http://des.chinabrands.com/uploads/pdm-desc-pic/Distribution/image/2016/04/13/1460539521233777.jpg" style="" title="1460539521233777.jpg"/></p>