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Switch transmitter/receiver mode by toggling the TX/RX button. Transmitter mode: Red light flashes when pairing and will stays on after the pairing is completed. Receiver mode: Blue light flashes when pairing and will stays on after the pairing is completed. Equipped with USB charging port, you can charge it with power adapter, laptop, power, etc. There is no need to replace the battery, which is good for the environment and easy to use. During charging, the LED indicator is red. When charging is complete, the LED indicator goes out. *Support using while charging. Compact and lightweight (77*27*10mm, 17.7g) that can be carried in pocket. You can easily use it, such as moving between rooms or taking it outdoors. * Voice calls and voice assistant functions are not supported. * Only one device can be connected at a time.






