FiiO on Twitter: "@zhenkit Sorry to hear that! Can the BTA10 work normally when the Blue light is on? Is the device connected to USB for charging? Can you ask him to
FiiO BTA10 - Review | ThePhonograph.net
BTA10 datasheet - 10A Triacs
BTA10-600C Triacs Datasheet pdf - Triacs. Equivalent, Catalog