Check the listing for details. Bilko Earplug 2. Condition: Used. Listed at 180.00 USD. Pros: Like Qbox - Sends signal out male xlr Monitors signal on female xlr Microphone or signal generator -40, -20 or 0dB level out Indicates dc on pin 2 and or 3 on the male output Headphone jack output Additional features: slightly smaller and made of machined aluminum When off there is a Push button flashlight Pink noise or tone generator - push button break of signal Phantom on Female input - either always or when push button pressed In amp mode high quality mic pre to line level - Steady phantom or only when Push button pressed in Mic mode mic is momentarily turned on by push button Very low distortion both on output and input Can use external power supply Accurate metering of input signal - -18 to +9 PPM style meter with BBC response Input gain calibration flashing Battery level led - when it goes dark unit still works but needs a newer battery. Internal dip switches Pink or tone Input gain setting 40 or 20 Phantom on or Push button Link sig to monitor or not This unit works and is used. The xlr connector on the bottom lost its tab so xlrs now get stuck in there. The manufacturer sells the parts to replace that.