-Experience true peace-of-mind and leave nothing to the imagination -The 4 channel security ball camera system can deliver HD 1296P image quality for cleaner, more accurate video footage that captures the details you need -The important feature of this camera is that it can capture sound -This camera comes with a built-in waterproof microphone , so you can hear things through them using the app -360 degree omni-directional voice collecting,professional speech processing chip reduce background noise -Motion detection comes as a standard feature, allowing you to save hard drive space by only recording scenes of movement -You can also choose to receive email alerts of motion events with snapshot attachments or push notifications sent to your smartphone or tablet -15 LED smart night vision modes provide clear full color or black-and-white pictures, even in complete darkness. -The cameras & the NVR connect to each other via their own proprietary network after powering the whole system -The camera is guaranteed to stand up against temperatures as low as -4°F (-20°C) to ensure year-round security monitoring that never stops working -H.264+ video compression tech records longer videos and consumes less bandwidth, saving up to 50% of storage space than H.264 coding without losing 2K clarity -You will enjoy smooth & fast live stream without latency Package Weight: 2900g Package Dimensions: 51cm x 18.5cm x 28m Package Includes: 1 x Manual 1 x Mouse 1 x Power Adapter 1 x NVR Decoder 4 x Power Supply 4 x Pack Of Screw 4 x Cameras