Only problem I've had is the size of the ear piece and static if the connector is bumped.
Professional 2-Wire Surveillance Kit with clear Audio Tube. In response to requests for a quality yet budget friendly product option, Two Way Direct now offers our new cost effective Surveillance Kit. For use with the Motorola RDU2020 and Motorola RDV2020.
Designed specifically with budget in mind, this split wire surveillance kit offers fantastic audio quality with reliable components and is the ideal accessory solution when low cost is the main issue.