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. Item Type: Video Doorbell Material: ABS Use: Household Color: Silver Battery: 3pcs 18650 batteries (Not Included) Viewing Angle: 166 degrees Signal to Noise Ratio: ≥39db Infrared Lights: 6 infrared lights, night vision distance is approx. 5-10m/16.4-32.8ft WiFi: 2.4GHZ 802.11 b/g/n Storage: Support 8GB/16GB/32GB memory card (Not Included) Audio: Two way conversation with noise reduction Motion Detection: Support PIR Human Body Induction: Support Use APP: For WoWCam Dingdong Working Frequency: 433MHZ Output Power: 0.15W Standby Power: ≤10mW Sensitivity: -112dbmm Volume: Maximum 100 decibels 1 x Doorbell 1 x Fixed Plate 1 x Ding Dong 8 x Screw 5 x Expansion Tube 1 x Hexagonal Wrench 2 x Connecting Wire 1 x Double-Sided Adhesive Sticker 1 x Manual