-An inexpensive solution for new home construction or for replacing an old or broken doorbell -Perfect for home, apartment, mobile home or RV -Up to 150 feet operating range -Compatible with all Carlon wireless "chime" systems only -Installs in minutes . Carlon Wireless Chime 8 Sound Doorbell RC3190D Wireless, Battery Powered. Chime indicator is approximately 4 x 2-1/2, doorbell is approximately 3 X 1. Sealed in package. An inexpensive solution for new home construction or for replacing an old or broken doorbell. SKU: home-6-21-22-30 Condition: New Brand: Carlon Color: white Size: 4 x 3 inch UPC: 081203031909 Manufacturer: Carlon Note: New / Old Stock. Order Processed Within 24 Hours. Ships With Tracking. Satisfaction Guaranteed.