The AKG WMS40 Mini Instrument Systems is a used wireless microphone system designed for musical instruments and professional audio equipment. Manufactured by AKG, this system is ideal for musicians and DJs looking for a reliable and high-quality microphone setup. With the compact size of the WMS40 Mini, users can enjoy the freedom of movement without being restricted by cables. This system provides clear and crisp sound transmission, making it a valuable addition to any live performance or recording setup.