Cheap bluetooth amplifier

I would like to introduce you to one of the cheapest, yet decently (for this price shelf) playing amplifiers with built-in bluetooth.I prepared a simple enclosure with a universal connection panel for power and speaker. The biggest advantage of this amplifier is its wide power supply voltage range, starting at 9V DC and ending at 28V DC. For this reason, all power tool batteries, car batteries, or plug-in power supplies with a capacity above 12V 2.5A will be as good as possible to power this design.I have tested and 4 as well as 8 Ohm speakers play.Shopping list:1x ZK-301B amplifier2x red connector<a target="_blank" rel="noopener noreferrer ugc" href="https://pl.aliexpress.com/item/1005005988853903.html?spm=a2g0o.productlist.main.1.7e70d87dzdi0CE&algo_pvid=0da8c3e3-8d96-457a-9b85-e51cc3aa0cbf&algo_exp_id=0da8c3e3-8d96-457a-9b85-e51cc3aa0cbf-0&pdp