Hikvision

2MP CMOS Sensor?1920*1080a30/25fps,4-mic array, built-in HD Speaker, 360� clear sound with 5 meters range,smart noise reduction, echo suppression, anti-reverberation, USB 3.0 cable...

4K CMOS Sensor?3840 x 2160a30/25fps,8-mic array, built-in HD Speaker, 360� clear sound with 6 meters range,smart noise reduction, echo suppression, anti-reverberation, USB 3.0 cable connection, AI...