Yesido KM27 4.3 inch TFT Screen 2.4G Wireless Video Intercom Doorbell 1. Material: PC+ABS+TPU 2. Main controller: V821 3. Speaker power: 1W 4. Image sensor: GC0328C5 5. Transmission mode: 2.4G 6. Video compression: MJPEG 7. Video compression: H.265 8. Power supply x2: Type-C, DC5V1A 9. IPC battery: 1000mAh (lithium battery) 10. LCD: 4.3-inch TFT screen, 480x272 pixels 11. Camera: 1MP 12. ​​Dual-mode wake-up, two-way intercom, low latency 13. External antenna design, long range, and anti-interference 14. Press the doorbell button to view real-time video on the screen 15. One-touch answering on the indoor unit allows for voice intercom with visitors at the door 16. Supports infrared night vision, allowing for clear visibility of visitors at the door day and night 17. One-touch photovideo recording for complete control of the door situation 18. The indoor unit features four ringtones with adjustable volume. 19. Volumebrightness can be adjusted with shortcut keys, eliminating tedious setup. 20. External industrial-grade antenna with a transmission range of 300 meters in open air and 50 meters indoors (through walls). 21. TF card support up to 256GB (not included). 22. Energy-saving design: The outdoor unit lasts approximately 6 months on a single charge.