Features Video 1080 HD Live Video, Live View, Night Vision. Video quality for the color Pre-Roll feature is less than 1080p.   Motion Detection Advanced Motion Detection with Customizable Motion Zones   Field of View 160° horizontal, 84° vertical   Audio Two-way audio with noise cancellation. Pre-Roll does not include audio.   Power Runs on a removable, rechargeable, Quick-Release Battery Pack (included). Can be hardwired to an existing doorbell system or transformer for continuous charging (8-24 VAC, 40VA max, 50/60Hz) or connected to a Ring plug-in adapter. No halogen or garden-lighting transformers; no DC transformer/power supply. *Improved battery life is based on an average of 20 or more motion events per day as compared to Ring Video Doorbell 3 Plus. Battery life will vary based on device settings, use, and environmental factors.   Box Includes Video Doorbell 4 Rechargeable, Quick-Release Battery Pack Satin Nickel Faceplate Corner Kit Installation Tools and Screws USB Charging Cable Quick Start Guide User Manual Security Sticker   Dimensions 5.1 in. x 2.4 in x 1.1 in (128mm x 62mm x 28mm)