UHF frequency band (receiving/transmitting): 400-480MHZ. FM radio (receiving): 87-108MHz Aviation frequency band (receiving): 109-136MHZ Voice encryption; Speech companding; Dual-stage dual reception; Duplex relay across segments; Dual menu operation; Dual DTMF compilation Built-in CTCSS/DCS; Dual-mode volume adjustment (mechanical and electronic); Condenser and dynamic microphones; Three-speed power adjustment (low 1W, medium 5W, high 10-15W); Full dot matrix graphic LCD liquid crystal display. The motherboard chip is fully upgraded, more power saving, longer standby time. Can be used with a split-screen keyboard display unit (KDU) for convenient operation.