Radio Active Designs V3BP4M Wireless Intercom Beltpack (A4M Connector) - B-StockRadio Active Designs has introduced the production communitys first ever Enhanced Narrow Band wireless intercom system. Enhanced Narrow Band offers RF channels possessing an occupied bandwidth of a mere 25 kHz with the audio characteristics one would expect from a traditional FM system. This UV 1G (updated to V3BP4M) also utilizes the relatively unused VHF range for all belt pack portable devices. This leaves more room for operation of other wireless