Add a wireless microphone to your S1 Pro+ with the Bose S1 Pro+ Wireless Mic/Line Transmitter, a plug-in XLR transmitter that turns any dynamic microphone into a wireless mic. A change of settings allows for the use of line-level signals. Use the integrated ports on the rear of the S1 Pro+ to pair the transmitter and recharge its internal 4-hour battery. When using a wireless microphone, the associated 1/4" channel input can be used as a TRS send/return effects loop on the S1 Pro+.