Bose 869722-0010 Wireless Instrument Transmitter S1 Pro+

The Bose Wireless Instrument Transmitter (model 869722-0010) is a compact wireless audio transmitter designed exclusively for use with the Bose S1 Pro+ PA speaker system. It plugs directly into any instrument's standard 1/4-inch output jack — guitars, basses, keyboards, and similar electronic instruments — and transmits audio wirelessly to the S1 Pro+'s built-in RF receiver at 2.4 GHz. The pairing process is effortless by design, with the transmitter automatically connecting to the speaker without manual frequency selection or channel scanning, letting performers go wireless with minimal setup time.

One of the transmitter's most practical design choices is its integrated storage and charging system. When not in use, the transmitter slots neatly inside the S1 Pro+ speaker body, where it charges automatically, eliminating the need for separate docks, cables, or chargers. With up to 4 hours of battery life and a reliable 30-foot wireless range, it suits small to mid-sized venue performances, rehearsals, and busking setups where freedom of movement matters. However, this tight integration with the S1 Pro+ is both its greatest strength and its most significant limitation — the transmitter cannot be used with any other speaker, amplifier, or PA system, making it a dedicated accessory rather than a versatile wireless solution.