Reddit reviews Dakota Alert DC-1000 Long-Range Wireless Doorbell with LED Light Flasher and Push Button - Up to 1000-FT Operating Range, Compatible with DCPB-1000 and DCMC-1000 Transmitters

Provides longer wireless operating range - Compared to most doorbells, the DC-1000's separate push button can send wireless alert signals back to its base for up to 1000-ftWireless operation passes through walls - The DC-1000 operates in 915 MHz radio frequency. This doorbell has the necessary power to send signals to pass through metal or cinder blocksOffers an expandable chime system - You can pair up to four Dakota Alert 1000 Series Transmitters with the DC-1000. It is compatible with DCPB-1000 Push Button and DCMC-1000 Door/Window ContactPlays 16 different alert tunes - You can program DC-1000's push button to play different melodies to distinguish which door was openedCan be set on audio or visual indicator mode - The selector switch on the doorbell's side allows you to choose if you want to use the chime only, LED flasher, or chime and LED flasher