[Warning]

Before firmware upgrade:

1. Make sure of the battery level at least over 50%.

2. Make sure of the memory size at least over 500MB.

3. User setting is initialized after upgrade.

4. Before upgrading, please make a backup of important files just in case.

[How to upgrade]

1. Connect to Wi-Fi

2. Find 'new' firmware on Setting - Update - System update

[Improvements]

1. Additional options in USB DAC mode:

   - Ability to switch Class A / B AMP

   - Ability to switch between OS / NOS options

   - Current sample rate displayed

2. Fix noise issue when switching AMP mode