Mini single instrumental set. The WMS40 Mini Single Instrumental Set is a true plug’n’play wireless solution providing crystal clear audio sound The included PT40 Mini pocket transmitter provides a professional 3pin mini XLR connector, compatible with guitar and bass levels, headsets and instrumental mics. Its extremely long battery life of 30 hours off a single AA battery saves money in day-to-day use. The receiver comes in an ultra compact housing and offers a 1/4'' jack output. 1x MKG L Instrument cable, 1x universal power supply with US/UK/EU, 1x AA size battery and 1x BC400 belt clip is included. Specifications SR 40 Mini: Operating frequency: 540. 4 MHz Frequency range: 40 Hz - 20 kHz, Signal to noise ratio: 105 dB THD (1 kHz): 0. 8% Dimensions: 133 x 43 x 132 mm; Specifications PT 40 Mini: Operating frequency: 540. 4 MHz, Frequency range: 40 Hz - 20 kHz, THD (1 kHz): 0. 8%, RF power: 10 mW, Signal to noise ratio: 105 dB, Dimensions: 60 x 74 mm