Kind tips; the new firmware version V2.39 effectively reduces issues such as non-linear volume adjustment and PTT delay. 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; city interference; 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 roars and sirens; making your voice stand out clearly in emergencies. Upgraded Radio Bracket; the radio bracket has undergone a comprehensive upgrade in quality and design; making installation easier; improving durability and stability; and extending service life.