?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&acute;s more£¬ it is easy to install£¬ even if you don&acute;t know any electronic know-how. It must be your ideal choice. Good helper for your security. Opportunity and tide wait for no man.                                    Features            Call / Night vision / Talking functionThis doorbell sets feature a bell sound£¬ small size and easy installed£¬ wall - mount holeIt can overcome any obstacles during the course of transmission and receivingThe performance is very stableThis door chime product is guaranteed to keep in good condition for freeThe convenient and unique designs electronic doorbell let you accommodations more upscale elegant                                                            Specifications            Power    0.5 w    <br>Definition    420 TVL    <br>Format    NTSC    <br>Lens Size    3.6 mm    <br>Camera Angle    92 ¡ã    <br>Camera Types    Cmos    <br>Pixel    510 x 492    <br>The Rain Proof    Yes    <br>Material    Aluminum alloy + ABS Plastic    <br>Dimension    5 x 12.5 x 4.4cm / 1.97" x 4.92" x 1.73" (L x W x H)    <br>                                                            Package Includes            1 x 420 TVL Waterproof Visual Doorbell Outdoor Camera Silver Black