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is a quad-band mini mobile transceiver known for its compact size and 25W output Radioddity Frequency Range: 136–174MHz (includes 220–260MHz) 400–480MHz (includes 350–390MHz) Power Output: 25W on VHF; 20W on UHF. Memory Channels: 200 channels. Operating Voltage: Strictly 13.8V DC (do not use 24V power supplies). qyt kt-7900d service manual