The Qbox is the all-in-one audio line tester ideal for applications such as live sound, maintenance, installation work or anywhere audio runs down a cable. The Qbox includes a microphone, a speaker, a test tone generator, outputs for standard headphones, a 1/4" jack for line-in or a 2k Ohm (telephone) earpiece out, plus voltage presence LEDs for confirming phantom or intercom power. A handy clip attaches the Qbox to your belt or equipment rack. For an instant hands-free intercom, simply plug in headphones and hook up one Qbox on each end of a line. Use it to monitor a standard 3-wire intercom feed or talkback from the main audio console.The Qbox can quick-check dynamic mics without firing up the entire system. It provides a handy mic or line-level tone for activating a signal path or identifying a specific cable in a pile of cable ends. Powered by a single standard 9V alkaline battery and housed in rugged ABS, the Qbox is light yet able to withstand the wear and tear of fieldwork. The SOURCE section of the Qbox lets you send a tone or the signal from the built-in condenser mic at mic or line levels. The SPEAKER volume control lets you confirm incoming signals at mic or line level.