Pairing two Teufel Bluetooth devices is possible with some models (see below). In the respective user manual, this option can be found under "Connect mode".
ROCKSTER AIR 2: can be paired with another ROCKSTER AIR 2 (via Bluetooth, up to 10 ROCKSTER AIR 2s can be paired via XLR cable)
ROCKSTER GO: can be paired with another GO.
ROCKSTER GO 2: can be paired with another GO 2.
ROCKSTER CROSS: can be paired with another CROSS (depending on the serial number).
Devices with A, B or C in the serial number (screenshot) can only be paired with devices with A, B or C in the serial number, not with "D" in the serial number.
Devices with a "D" in the serial number can only be paired with devices with "D" in the serial number. Fender x ROCKSTER CROSS devices can only be paired with Fender x ROCKSTER CROSS devices.
BOOMSTER: supports the function with which the sound can be played back simultaneously from two BOOMSTER speakers. Applies only to the current BOOMSTER (not BOOMSTER 2020).
ROCKSTER XS*: can be paired with an identical ROCKSTER XS - true stereo function
*Note that two ROCKSTER XS from different series cannot be paired with each other.
BOOMSTER GO: Two BOOMSTER GOs can be paired and then play synchronously in stereo