2. After USB power supply, the blue light flashes, the Bluetooth connection is successful, and the indicator light is off
3. Connecting to old-fashioned speakers, speakers without Bluetooth function can also transmit wirelessly
4. Automatically connect to mobile phone Bluetooth, more efficient transmission and clearer broadcast
5. Gold-plated interface, not afraid of oxidation, better sound quality
6. Material: ABS
7. Receiving distance: 10m
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