The affordable, feature-packed 150 GTL DX uses a Mosfet 20-watt dual final transistor design to ensure maximum output power. Among its more valuable functions are 320 channels (with 80 channels per switch setting); 32.8-foot AM/FM operation; a dual power mode that offers a choice between full power (with a larger range) and low power (which conserves output); SWR antenna calibration that helps users receive the best signal (especially in tandem with the antenna warning indicator); and a 10 kHz control switch. Fortunately for operators, the radio also includes a number of extras to improve transmission and reception, including a talk-back control for monitoring the sound feedback effects, tone and echo controls that manage the echo effect and intervals, and a mic gain that dynamically boosts the microphone for increased voice clarity.