Original Xiaomi Smart Doorbell 4 Pro(Black)

1. Doorbell rated input: 5V/2A 2. Doorbell wireless connection: WiFi IEEE 802.11b/g/n/ax, 2.4GHz, Bluetooth Low Energy, 433MHz 3. Doorbell battery capacity: 9800mAh 4. Doorbell storage: Cloud storage + 32GB eMMC internal storage 5. Doorbell operating temperature: -10°C to 45°C 6. Doorbell charging temperature: 0°C to 45°C 7. Doorbell compatible systems: Android 8 and iOS 12.0 and above 8. Doorbell receiver rated input: 100-240V, 50-60Hz, 0.04A 9. Doorbell receiver wireless connection: 433MHz 10. Doorbell receiver operating temperature: -10°C to 45°C 11. Doorbell receiver operating humidity: 10%-90% RH, non-condensing 12. Dual-lens cameras offer a wide field of view, covering every area in front of your door. 13. 5MP ultra-clear main camera captures crystal-clear details outside your door. 14. Ultra-clear infrared night vision provides clear visibility in dark corridors. 15. 6-month battery life, requiring only two charges per year. 16. 24/7 intelligent detection for monitoring outside your door. 17. 180-degree infrared alarm for sensitive sensing. 18. Built-in storage and cloud access provide dual security for critical evidence. 19. Secure chip encryption protects data and privacy. 20. Soft light design for a gentle glow. 21. Smart voice control for easy access to doorbell status. 22. Multiple anti-loss features, including removal alarm.