1、Two Way Audio: Noise reduction, you can talk to visitors wherever you are, and will not miss your package and any visitors. 2、Video Playback: 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, and 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 you can set the sensitivity time. 5、Loop Record: The doorbell can automatically overwrite expired video files to facilitate the management of monitoring records. 6、Infrared Night View: 166° viewing angle, automatic switching, 24hour HD picture to protect the safety of you and your family. 7、Wire Free : Just download the APP and connect it to your doorbell, and you can watch the monitoring area in front of the doorbell at any time via your devices. Item Type: Video Doorbell Material: ABS Application: Household Color: Silver Battery: 3pcs 18650 batteries (not included) Viewing Angle: 166 degrees Signal to Noise Ratio: ≥39db Infrared Lights: 6pcs 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 cancellation Motion Detection: Support Use APP: For WoWCam Dingdong Working Frequency: 433MHZ Output Power: 0.15W Standby Power: ≤10mW Sensitivity: -112dbmm Volume: Maximum 100dB 1 x Doorbell 1 x Ding Dong 1 x Fixed Plate 7 x Screw 4 x Expansion Tube 1 x Hexagonal Wrench 2 x Connecting Wire 2 x Manual