?Get rid of the restraint of wired design and enjoy your digital wireless life! Our CT8501B11 7" Color Display One Indoor Unit + One Outdoor Unit Wireless Video Door Phone Doorbell must be the one you prefer. Fine connection between the indoor unit and the outdoor unit makes things easier and more convenient. You needn¡¯t to deal with the negligible cases personally. With this wireless doorbell£¬ you can save both time and energy. Each button this device performs well£¬ and it is so effective and powerful that it absolutely guarantees your daily security. Just install this one for your household use!                                    Features             With an indoor unit and an outdoor unit<br> Hands free video door phone<br> 4 LED indicators light while the doorbell is working<br> 7" color monitor with ultra-slim design£¬ nice and luxurious<br> Completely wireless operation: no wires or cables are required<br> It is easy to install by yourself<br> No radiation£¬ low consumption and high resolution<br> Monitor the outside condition by pressing the key<br> Image brightness£¬ color and volume can be adjusted<br> More effective and easier to control the doorbell£¬ bringing you much convenience<br> Keep you aware of intruders or visitors anywhere around your house<br>                                                            Specifications            Indoor Unit        <br>Power    Input: AC 100-240V 50/60Hz Output: DC 5V / 1A    <br>Display    7¡¯¡¯ LCD£¬ 320 x 240 Pixels    <br>Standby Time    Up to 20 days    <br>Ringtone    12 chord melodies    <br>Working Frequency    2.4GHz    <br>Charging Time    3 hours    <br>Dimensions    (24 x 13 x 2)cm / (9.45 x 5.12 x 0.79)" (L x W x H)    <br>Outdoor Unit        <br>Camera    CMOS 0.3Mega Pixels    <br>LED    4pcs    <br>Power by    Power Adapter / BL-5J Lithium Battery    <br>Standby Time    1~2 Month    <br>Angle    92 degree    <br>Work Temperature    -20¡æ - +55¡æ    <br>Dimensions    (8 x 5 x 2.5)cm / (3.15 x 1.97 x 0.98)" (L x W x H)    <br>Total Weight    853 g / 30.08 oz    <br>                                                            Package Includes            1 x Indoor Unit<br>1 x Outdoor Unit<br>2 x US Standard Adaptor<br>1 x USB Cable<br>2 x 1320mAh Lithium Batteries<br>1 x Manual<br>1 x Screw Accessories<br>