We already updated the latest firmware version of AP60 II &AP60 pro in our website. Kindly go to Download column in any cases you need.
1.Optimize the compatibility of Bluetooth.
2.Add the Bluetooth output to support DSD64 file.
1.Be asure AP60 II has a 50% above electric quantity.
2.Copy the "update.upt" file to TF card.
3."System setting" - "System Update" - "OK"
Wait and finish the upgrade.
Hghly appreciate your kind support. And we look forward your any feedbacks.