Sennheiser SpeechLine Digital Wireless Series System Documentation page 132

Charging the boundary microphone via USB
To charge the boundary microphone via USB:
►
▷ Connect the USB cable's Micro-USB plug to the Micro-USB socket of
the boundary microphone.
▷ Plug the other end of the USB cable into a USB power supply unit.
The charge level LEDs indicate the charge level.
The SL Boundary 114-S DW
131