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Here you can download the latest updating firmware, complete user manual and other useful information and tools to keep the product in the best working state.USB DAC Driver-4.13.0 Foobar2000 Install Pack Q5 sysetem firmware file - v0.52 Q5 system firmware upgrade tool Instruction of Upgrading the Q5 System Firmware Instruction of Upgrading the Q5 Bluetooth Firmware Q5 - Bluetooth firmware package Q5 - Bluetooth upgrade tool package