and their respective frequencies (VHF 136–174MHz or UHF 403–470MHz). PL/DPL (CTCSS/DCS) codes for interference reduction. Managing programmable buttons and features like VOX (Voice Operated Transmission) Dual Priority Scan Required Hardware
: Typically requires a specific Motorola-branded cable (such as the RKN4155 or similar models depending on the region) that connects to the accessory port. PC Interface motorola gp3688 programming software exclusive
integrate the converter circuit directly into the USB shell, eliminating the need for a separate Radio Interface Box (RIB). : Older setups may still use the Motorola RLN4004 Radio Interface Box and their respective frequencies (VHF 136–174MHz or UHF