Features:The doorbell can see the face of the visitor clearly, improve the safety factor of the home, and let you know who is standing at your door - Long distance signal transmissionsupport multiple users to watch online at the same time - Easy installation - You can turn on the camera any time to Watch all the dynamics in the yard - Good quality: The doorbell is made of high-quality materials, exquisite workmanship, very good quality and long service life - Specification:Video Doorbell Chipset: Realtek8715(with wifi)RAM: 32MBFlash: 8MBDetection range: 10m, 110 degree - TF Card: max 64G not include - Battery Type: 18650*2Antenna: 3DBi * 1,433 Ant*1Viewing angle: D*H*V 121*90*68Effective of pixels: 2.0MPVideo Format: H264Resolution & frame rate: 1080PAPP:tuya - AC Adapter: DC 5V 1AOn line visitor: max 5Remote control and monitoring: support - Power failure memory: support - Pairing: scan QR code - Size:14.6*5*3.7cm Plug-in Chime Voltage AC90-260VOutput Power: 0.15w - Standby Power:<=10mw - Frequency: 433MHz - Volume Up to 100db - Sensitivity: -112dbm - Product contains1 x Video Doorbell 1 x Plug-in Chime 1 x double-sided adhesive sticker1 x tool kit1 x Quick Guide1 x Instruction Manual