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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.X5III FW1.0.9 X5III's USB DAC driver(v4.11.0) X5III complete user manual X5III FW1.1.0 X5III FW1.1.1 X5III FW1.1.2 X5III FW1.1.3 X5III FW1.1.4 X5III FW1.1.5 X5III FW1.1.6 X5III FW1.1.7 X5III FW1.1.8