The biggest advantage of the Q20 is 5 megapixels, with a resolution of up to 2560X1440 Ultra HD 2K, better results. Built-in 1800mAc dual lithium battery, working time of more than 5 hours, standby time of more than 1 year. 8 straw hat 940nm infrared light, automatic switching night vision, no red dot, better night vision, support voice real-time intercom, 160 degrees wide angle lens, whether in the indoor / outdoor can be used. Support 128G memory card, do not worry about the memory problemIt is a video-only surveillance equipment that does not record sound, recorded video without audio(Via Amazon no audio policy).