Product Description 1. Application scenarios: indoor/outdoor2. App Name: Smart Life/Tuya Smart App3. Chip model: BK72524. Whether echo cancellation is supported: yes5. Effective pixels: 300,000, 480P6. Appearance: ABS7. Focal length: 2.0mm8. Field of view: 809. Infrared night vision: support10. Night vision distance: best 1 meter, maximum 3 meters11. Frame speed: 7 frames12. Intercom voice: two-way13. Voice pick-up function: built-in microphone, sound pick-up distance of 3 meters14. Speaker: 8 Euro 0.8W15. Motion detection: not supported16. Wired network: not supported17. wifi standard: IEEE 802.11b/g/n18. Video encoding: JPEG19. Voice Code: G711A20. Repeat video: not supported21. Memory card: not supported22. Power supply: DC3.7V 1000Mah lithium battery23. IP: IP5524. Wire length: 30CM25. Installation: drilling/gluing26. Ding Dong music box technical parameters: Songs: 19 songs4 levels of volume adjustable (high, medium, low, mute27. Speaker: 8 euros, 1 watt.28. Distance: Open straight, 50-60 meters, through the wall about 30 meters29. Power Supply: 5V1A30. Frequency: 433.92 MHz31. Transmit Power: 13dBm installation mode USB plug and play