* 📹 Two-way audio and video communication * 🔓 Remotely open the door or gate * 📱 Control from mobile via Hik-Connect * 🖥 Touchscreen indoor monitor depending on the model * 🎥 Integration with surveillance cameras * 🚨 Integration with alarm and access control systems * 🌐 Network-based IP system * 🏢 Suitable for villas, offices, apartments, and buildings * 🔐 Support for multiple authentication methods in some series and models such as card, PIN, face, Bluetooth, and QR.