Overview: 1.Three 18650 specification batteries. 2.Million HD pixels collocated with 166 degree wide-angle lens 3.Support mobile phone remote fast wake up device within 1 second. 4.2.4G Wi-Fi connection 5.High quality two-way talk with noise cancellation 6.Support PIR motion detection, when someone hovers at the door, immediately alerts push notifications to the mobile phone. 7.Day and night mode automatic switching, whether day or night, the image is clearly visible, for your safety and family security Specifications Main control CPU VIA GM8135S Built-in ARM926 @ Max.440MHz Alibaba Cloud Storage 7 days free unlimited capacity Video resolution 720P / 15-30fps Lens Sensor 720p GC1054 CMOS sensor Lens: Wide-angle 140 degrees (no distortion) Supports PIR motion detection WIFI supports 802.11b / g / n Two-way voice real-time intercom Battery specifications: universal 18650 3 cells Standard battery 2600 mAh (optional) Bettery is not allowed for many shipping methods, so it is not included in the parcel. item size 144 * 74.5 * 32mm Packing size 190 * 105 * 40mm A single set of product accessories includes a color box, instruction manual, 3M glue, screws (no battery include) Single set of products 268g (without battery) Chime Weight 90g EU,US,UK,AU 1EU with 3 batteries inserted with 3 batteries 1UK with 3 batteries inserted with 3 batteries Package Content: 1 x Door Bell