Samson AirLine Micro Earset Owner's Manual page 14

Guided Tour - AR2 Receiver
5. Audio Output Level Switch - Sets the audio output level of the unbalanced output to microphone or line level.
6. USB DC Power Input - Connect the supplied universal adaptor to recharge the internal lithium ion rechargeable battery or
to power the receiver. The USB DC input will also accept USB bus power from a computer USB port, or any 5-volt DC
adaptor that has a USB output (including automotive).
NOTE: The USB port is only used for charging purposes and cannot be used for data exchange between a PC and the AR2
receiver.
7. 1/8" Unbalanced Output - Use this unbalanced (600 Ohm min.) 1/8" (3.5 mm) mini-phone jack when connecting the audio
equipment.
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