This is the Si4732 IOTCU-V9.1 HF Shortwave SSB Bluetooth Board For Quansheng K5 (8) / K6 Version 1 and Version 3 radios. If you don’t know, the version 2 models are not compatible with aftermarket firmware and are not compatible with this HF board. For more information on the version 2 models of Quansheng radios read here. As I’m sure you’re aware beings as you are on this post, the installing of this board requires some technical know-how, so only attempt to fit this board if you are competent with modifying radios.

There are some videos on YouTube that show how to perform the install. However, If you’re not feeling up to the job but do want a Quansheng with the HF modification procedure already completed, there are radios being sold that have already had the mod installed. They are more expensive than a normal non-modified original due to the extra work involved and extra features but well worth the money. You can find out more information on that here.