The New Goldline GL14 is a 14 function sine wave generator with a Phantom Power Indicator is a handy and cost effective tool. Rugged and pocket-sized, it belongs in every toolbox. The compact design features a Microphone Level Output with 14 functions activated by a single push button. Packaged in a Standard Neutrik XLR connector, the GL14 is easy to carry and easy to use. Its multiple functions will help you with the analysis and calibration of sound systems and will facilitate trouble shooting. The internal amplifier in the GL14 utilizes phantom power from your XLR audio mic lines to generate the tones.