These wireless doorbells feature Honeywell ActivLink technology and boast a wireless range of 200 meters. This ensures that you can take the doorbells anywhere in your home and garden while staying informed about any visitors at your door. Thanks to the built-in repeater/wireless amplifier, the range can be extended to up to 400 meters with a second doorbell set. The light ring is equipped with 7 adjustable colors and an LED flash for visual notifications. The sleep/silent mode allows the doorbell to be silenced for 3, 6, 9, or 12 hours, or indefinitely. The doorbells come pre-configured and are ready to use immediately after purchase. Alternatively, the doorbell can also be powered via a power adapter with Micro-USB (5 V/2 A).