Qudelix 5K User Manual page 6

Pairing with Android
1. Power On 5K
BL(Blue Lower)
BL button long press more than 3 sec.
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2. Enter Pairing Mode
BU button long press more than 3 sec.
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Red, Blue LED blink when pairing mode
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3. Go to your Android Bluetooth menu
Scan Bluetooth devices
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Select Qudelix-5K
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4. Enter Qudeilx-5K option
Enable LDAC (Android 8.0 or higher)
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BU(Blue Upper)
*Enable Sony LDAC after pairing