GL1K Microphone Input Tester     The GL1K is a microphone input tester consisting of tone generator and phantom power detector built into a standard 3 pin XLR male connector. When inserted into a microphone input connector, the LED indicator will light showing that there is a phantom power voltage present. If a voltage is present, a 1kHz tone will be sent into the microphone input.   Specifications   Output: 1kHz @ -48dBm Distortion: 1.5% nominal Power Requirements: 12Vdc - 48Vdc phantom power. Size (L x D): 2.75" x .75" Weight: 2 oz. Case Material: Die cast body. Approvals: CE, RoHS and WEEE