Profile: Mercia Radiotelephones Ltd supplies two way mobile and portable radio systems. The DP3400/3401 UHF portable radios, part of the MOTOTRBO™ range, are ideal for professional organizations that need a customizable, business-critical communication solution using licensed spectrum. It features 32 channels, built-in GPS module, IP57 environmental sealing helps ensure continued operation in tough working conditions, remote monitor features help ensure employee safety and enable fast assessment of remote user status and connector with RF port & USB interface for advanced connectivity. Repeater is a device that receives and rebroadcasts radio signals. It is used to enable communication between two poorly sited radios, or radios with weak signals such as hand portables.