The Swann. Buddy4K is a full-featured, easy-to-install wireless 4K video doorbell & chime unit that's now even smarter. It can operate 100% wire-free with the rechargeable battery or connect to your existing doorbell wiring. Experience exceptional 4K detail and a head-to-toe view with 165° vertical viewing angle. True Detect senses heat & movement for reliable alerts. See in the dark up to 16ft or 5m with powerful infrared night vision. Save clips locally & to the cloud. Use the free Swann. Shield AI Voice Assistant for added protection to talk with visitors when you can't or are away from home. It’s security you can trust.