Galaxy DX-939 Backlit 40ch Mobile  CB Radio with TalkBack & Roger Beep Star Lite faceplate makes all lettering glow in the dark Large, easy-to-read meter with scales for power output, modulation, SWR and incoming signal Five-digit frequency counter and two-digit channel display using large blue LEDs , variable power output control, variable talkback circuit with on/off switch Automatic SWR circuit with an SWR alert LED, Roger Beep circuit with on/off switch Variable dimmer control, frequency display on/off switch, 3-position tone switch for receive