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39. Mixer: Adjust echo mode. 40. Mute: Turn off the sound. 41. Sound Effect 42. Prev: Previous song. 43. Next: Next song. 44. Vol-: Decrease volume. 45. Vol+: Increase volume. 46. Menu 47. Media: Switch between current mode and Bluetooth, USB, TF card modes. : Left arrow.
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NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
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