Convenient wireless connection, USB charging, doorbell ready to use with just one click Seeing the real elderly and children living alone , seeing the visitors clearly before opening the door Wide angle and wide field of view 170 ° wide angle and wide field of view camera, providing a more comprehensive view Clear depiction, perfectly presenting the scenery outside the door LED night vision supplementary lighting is not afraid of no light environment, and can be seen even in the dark Visual angle:170° Battery capacity:1000mAh Display screen:4.3 inches TF memory card:supports expansion Night vision type:LED fill light Power supply information:DC5V/2A Working temperature:-10℃-60℃ Audio information:built-in speaker, microphone Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:As Shown Material:ABS Package Contents: 1 * Visual doorbell kit 1 * 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.