AOSU Indoor Wireless Alarm System Video Doorbell

Product Details:

Power Source: Battery-powered
Item Dimensions LxWxH: 4.01 x 2.87 x 1.14 inches
Video Capture Resolution 5 mp

Door and window alarm uses three 1.5V button cell batteries. Easy to install.
Has on/off switch located on the left of product.
Smaller unit provided to attach to door post or window side.