Two-way full-duplex simultaneous video intercom, Ultra-low power consumption, ultra-long standby time. Video doorbell without WIFI, enhancing information security ,Wireless installation, one-click pairing, easier installation 4.3-inch IPS screen, full-view display, clear visibility ,2.4G proprietary protocol, long transmission distance, stronger signal Indoor unit in continuous plug-in mode for fast response, System automatically saves photos and records video upon card insertion Infrared night vision function, Indoor unit with 6-song switching function, Weight: 0.8487797087 pounds, Manufacturer: Xnuiasqe