Features: [Real-time Video & Remote Control] Available to watch the real-time image even when you are out, download the APP Ulooka and the mobile receive they notify when someone rings the doorbell. [Hidden your Real Voice] Provide 2 different voice sound - male voice and funny sound, one button to switch and hide your real voice, safe for single people who live alone. [Clear Night Vision] Equipped with LED infrared light. Intelligently switch to infrared night vision mode. The image is clearly visible, you can see clearly without light. [Equipped with Doorbell Chime] Strong and stable signal, easy to pair up, the transmission range between the doorbell and chime is up to 10 meters; with USB power supply, easy to install, no worry of low battery. [Power Supply] The doorbell is powered by built-in 1000mAh large battery, has long working time after fully through power bank, AC adapter, computer, and more, no need to charge frequently. Specification: Resolution: 1280x720 Doorbell Visual Recording Range: 5m Audio Decoding: g.711/s System: for Android 4.3 or iOS9.0 or later Battery: 1000mah Storage: Support 32G Material: plastic colour: black Package Contents: 1 x Smart Video Doorbell 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.