This wireless doorbell is only compatible with Blink Video Doorbells and Blink Video Doorbell (2nd Gen) The transmitter size does not fit with and Blink Video Doorbell (2nd Gen) . Blink Chime for Doorbell - Upgrade your Blink video doorbell to wireless connectivity with our wireless transmitter. Say goodbye to the limitation of single app notifications, and work with Blink doorbell to let you hear the chime from anywhere in your home. Easy to Install and Pair - The transmitter and doorbell need to be wired, and the existing way is more suitable for blink video doorbell. First use the pre-installed cable; press and hold the volume button for 5-7 seconds to pair the transmitter and receiver, and then press the doorbell button on the Blink video doorbell. Wide Coverage - The doorbell extender has a coverage range of up to 656 feet (about 200 meters)