Here's a concise summary of the doorbell's key features in a language that appeals to buyers: 1. **Sharp Video**: 720P/CVBS support for crisp visitor identification. 2. **User-Friendly Screen**: 7" TFT LCD for easy navigation. 3. **Secure Entry**: RFID card option for convenient access control. 4. **Durable Design**: IP44 rated for all-weather and vandal protection. 5. **Low-Light Visibility**: Clear color night vision with white LEDs. 6. **Scalable System**: Supports 2 door stations, 4 monitors, and 2 CCTV cameras for flexible security solutions. 7. **Ample Storage**: Holds 100 images internally and supports SD cards up to 128 GB(exlude) for extensive visitor record keeping. ※ Handsfree Dual-way Intercom ※ Waterproof function ※ Max. distance between part A & part B is 1 KM in open area and no signal disturb. ※ CVBS ※ One key to unlocking, easy ※ Installation Way: Surface Mounting ※ Support Micro SD card Max. 32GB ※ Low consumption 2*18650 Lithium battery .