4-Mile Long Range MURS Wireless Intercom System for Home or Business by Dakota Wireless Professional grade LONG RANGE wireless intercom system with up to a 4-mile range (range diminished by trees, hills, and buildings) Set of two base stations included but fully expandable to an UNLIMITED number of MURS intercoms. SUPER EASY to set up. No pairing required, just turn to the desired channel. 5 channels and 38 sub-channels. LOUD adjustable volume and EXCELLENT sound quality. Compatible with all MURS radio frequency products.