This isn't a physical accelerator, but rather software-based CPU overclocking. To unlock this feature, you need to purchase a license code from the AmiKit store. The code comes bundled with an aluminum heatsink that needs to be installed. If AmiKit doesn't offer the option to buy the code without the heatsink, I’ll end up with two, as I already bought one a while ago. It’s a standard accessory for the Orange Pi Zero 3.