[Real-time Video & Remote Control] Available to watch the real-time image even when you are out, the mobile receive they notify when someone rings the doorbell. [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. Colour:Black Material:ABS Package Contents: 1 x Doorbell(With Backplate Mounting accessories) 1 x Chime(Note: It is a USB port and requires a USB power port) 1 x USB charging cable 1 x English manual Only the above package content, other products are not