Dear Customers：

Thank you for your continuous attention and support to YM products. Free ETHW/ETF firmware is now available (for YM100 & YM 200 Series only).

Upgrade description is as follows:

-Original YM-ETH firmware supports ETHW/ETF mining. For users who have not switched firmware to ETC, ETHW/ETF can be mined directly.

- For users who have already switched firmware to ETC, if you wish to switch back to ETHW/ETF, please download the firmware and upgrade it according to the upgrade guide.

-Firmware upgrade guide file is as follows. Before performing any operation, please read the document carefully. Please contact our after-sales service staff, if further assistance is needed.