Behringer ULM300USB, Transmitter with Remote Control in 2.4 GHz Range, USB Receiver (power supply via USB connection), Maximum range: 60 m, Volume control on the hand-held microphone, Mute function, Battery indicator, 2.4 Ghz ISM band license-free worldwide, Dimensions: 53 x 53 x 260 mm, Weight: 0.3 kg