1Built-in 4G module, can be connected through mobile phone 4G card, no need for WIFI network. 2Support A-B two point cruise, preset point inspection route, and it has power off memory function. 3 5X optical zoom, supports the whole process focusing at the same time. 4P2P penetration technology, the distance is up to 328.1ft, one key match, plug and play. 5Built-in high anti-interference microphone and speaker , with echo elimination and noise suppression technology, which can achieve two-way voice intercom.