Specifications: Product Material: ABS Product Size: Doorbell: 12.7 x 4.4 x 2.6 cm/5 x 1.73 x 1.02 inches Chime: 4.7 x 4.3 x 1.4 cm/1.85 x 1.69 x 0.55 inches Product Color: Black Waterproof Rating: IP65 Battery: 1 integrated 3.7V 1,000 mAh battery (doorbell) Power: 800W Current: 5V 2A Lens: 125° wide-angle, white light for night vision Network: Wifi IEEE802.11B/G/N, 2.4GHz (does not support 5G), RF433MHz Remote Monitoring Solution: BK Storage Function: TF card (max. 64GB) (not included) and Cloud storage, free permanent Voice System: Two-way intercom/Remote viewing of mobile guests Recording Range: 5m/16.4ft System Support: Compatible with Android 4.3 or iOS 9.0 or later versions USB Interface: TPC-/DC5V-1A Wireless Connection of Chime: RF433MHz, USB power supply Application: Tuya App Download Method: For compatible Android phones, download from your own Market or App Treasure by searching "Smart Life". For compatible iOS phones, search for "Smart Life" in the App Store to download. The function of this doorbell is only supported on versions 4.3.0 and later of the application. Correspondence between Chime and Doorbell: 1. Turn on the chime. 2. Long press the chime pairing button for 3 seconds, and the indicator will flash. 3. Press the doorbell button, the chime will sound, indicating successful pairing. Package Contents: 1 x Doorbell 1 x Back Shell 1 x Chime 1 x Adhesive Tape 1 x Type C 1 x Screw Set 1 x User Manual