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Bose S1 Pro+ Portable Bluetooth® Speaker System

Sold from 2023 – present

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Wireless transmitter doesn't power on

If you are having power issues with the wireless transmitter, try these steps:

Fully charge the transmitter and power on again

Using the charging ports

  • Fully insert the wireless transmitter into the wireless transmitter charging port for either Channel 1 or 2 until you hear or feel a click.
  • If the system is powered on, a battery icon with a lightning bolt will appear briefly next to the channel display to indicate the transmitter battery is charging. A lightning bolt icon then appears in the upper-right corner of the display.
  • When the transmitter is fully charged, the lightning bolt icon disappears.
NOTE: If the system is connected to power, the AC (mains) power connection charges the transmitter. If the system is operating on battery power, the system battery charges the transmitter, unless the system battery charge is less than 35%.


Using a wall charger or computer

Use this product only with an agency-approved LPS power supply that meets local regulatory requirements (e.g., UL, CSA, VDE, CCC).
  1. Connect one end of a USB-C cable (not provided) to the USB-C port on the top of the wireless transmitter.
  2. Connect the other end to a USB-A wall charger or computer. The power light glows solid white. When the transmitter is fully charged, the power light turns off.
 Allow up to 2 hours to fully charge the wireless transmitter battery. With typical usage, the battery lasts up to 5 hours.

Reset the Wireless Transmitter

Factory resetting a wireless transmitter clears all pairing information and returns it to original factory settings.

On the transmitter, press and hold the Power button  for 10 seconds until the power light turns off. Then try to power on the transmitter.
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