Retevis MA1 Dual Band Radio | Cross-Band Repeater & Mobile Transceiver 2-in-1 | Superheterodyne Receiver| Air Band Reception | Detachable Control Panel | Noise Reduction Base Stationn About this item: Eliminate Dead Zones & Boost Range; Conquer mountains; cities; and buildings! MA1 cross-band relay acts like a signal tower; automatically bouncing your calls to teammates beyond direct reach; Stay connected anywhere. Crystal-Clear Reception in Chaos; Cut through tunnel static; or crowd noise; Advanced receiver filters out junk signals; locking onto clear comms when it matters most; Hear and be heard. Durable & Clear; Flip Panel & Noise Cancel; Tough reversible panel protects ports from bumps; Flip it for perfect viewing; Plus; TX noise cancellation strips engine ro.