Compact and easy to set up UHF wireless microphone set with 2 handheld transmitters and single USB receiver. The receiver simply plugs into a USB power supply or USB port for power and outputs a mix of both microphones to a 3.5mm jack socket. A plug-through USB connection is provided on the receiver to allow the USB port to continue to be used for connection to media or other USB devices (e.g. for a USB flash mp3 player port). The handheld transmitters are powered by 2 x AA batteries each and operate on 2 UK/EU licence-free UHF frequencies. This system avoids the need for a free-standing or rack-mounted receiver and can operate from a standard USB power supply for ultimate convenience.