Feature:1. Two Way Audio: With noise reduction function, you can talk to visitors wherever you are, and will not miss your package and any visitors.2. Video Playback Function: When a friend visits you but you are not at home, you can watch and play the video on your phone.3. High Performance: Low power consumption, the volume can be controlled, the maximum volume can reach 100dB, with LED indicator.4. PIR Motion Detection: Whenever any movement is detected, the camera will send an alert to your phone, and the sensitivity time can be adjusted.5. Loop Recording: The doorbell can automatically overwrite expired video files to facilitate the management of monitoring records.6. Infrared Night Vision: 166 viewing angle, automatic switching, 24hour HD picture to protect the safety of you and your family.7. No Wires Required: Just download the APP and connect it to your doorbell, and you can access the monitoring area in front of the doorbell at any time via your devices.Specification:Item Type: Video DoorbellMaterial: ABSUse: HouseholdColor: SilverPlug Voltage: 90-260VBattery: 3pcs 18650 batteries (Not Included)Viewing Angle: 166 degreesSignal to Noise Ratio: 39dbInfrared Lights: 6 infrared lights, night vision distance is approx. 5-10m/16.4-32.8ftWiFi: 2.4GHZ 802.11 b/g/nStorage: Support 8GB/16GB/32GB memory card (Not Included)Audio: Two way conversation with noise reductionMotion Detection: SupportPIR Human Body Induction: SupportUse APP: For WoWCamDingdong Working Frequency: 433MHZOutput Power: 0.15WStandby Power: 10mWSensitivity: -112dbmmVolume: Maximum 100 decibels.Package List:1 x Doorbell1 x Fixed Plate1 x Ding Dong8 x Screw5 x Expansion Tube1 x Hexagonal Wrench2 x Connecting Wire1 x Double-Sided Adhesive Sticker1 x Manual