The Sennheiser EW-D CI1 SET with CI 1 Instrument Cable combines pristine 24-bit digital audio with an impressive 134 dB dynamic range, equidistant tuning grid, and automated Bluetooth set up App for your phone to create a professional rackmount wireless instrument system that anyone can use. Though easy to set up and simple to operate, the system's pro-level feature set is well equipped to handle the needs of both first-time and experienced users alike, bringing reliable wireless sound with ultralow 1.9ms latency to guitar/bass players and instrumentalists performing in small to medium-sized venues including concert stages, houses of worship, theaters, and clubs.