This security powered wired doorbell provides an extra security and convenience for your house and working place. The doorbell lets you know a person calling at your door before you open it. This excellent wired doorbell can be used at dwelling house￡? working place￡? and factory. Built-in anti-interference system￡? it avoids false ringing and miscommunication. What?ˉs more￡? it is easy to install￡? even if you don?ˉt know any electronic know-how. It must be your ideal choice. Good helper for your security. Opportunity and tide wait for no man.                                    Features             This doorbell sets feature a bell sound￡? small size and easy installed￡? wall-mount hole <br> It can overcome any obstacles during the course of transmission and receiving<br> The performance is very stable. <br> This door chime product is guaranteed to keep in good condition for free <br> The convenient and unique designs electronic doorbell let you accommodations more Upscale elegant<br> The may length wire between the doorbell and button as you like<br>                                                            Specifications            A.Indoor monitor        <br>Power supply    DC13.5V    <br>Power consumption    Standby:!#!lt!*!0.2W Working:?ü8W    <br>Resolution    320x240 dot    <br>Viewing angle    L: 50??/ R: 50??￡? U:15??/ D:35??    <br>Brightness    300cd/m2    <br>Video input    1VP-P    <br>Cut-off time    stakeout:1minute￡?conversation:1minute    <br>Sensitivity    -60dB    <br>Operation temperature    -10??-+55??    <br>Calling Tone    "Ding Dong"chime    <br>External dimension    160x90x20.5mm     <br>B.Outdoor camera        <br>Power supply    DC12V(supplied by the monitor)    <br>Power consumption    Working:!#!lt!*!2W    <br>Viewing angle    92?? (53?? for pinhole camera)    <br>Lighting source    infrared LED    <br>Operation temperature    -10??-+55??    <br>External dimension    100 x 100 x 21.7mm    <br>Pacakge size    29 x 21.5 x 12cm    <br>Color    white    <br>Weight    1438g    <br>                                                            Package Includes            1 x Indoor monitor<br>1 x Outdoor camera<br>1 x Monitor bracket<br>1 x AC adapter(145cm)<br>1 x cable(5m)<br>1 x connector wire<br>1 x manual<br>3 x accessories<br>