I bought an accelerator about a year before I bought this new one for the gameboy advanced SP. The first one was defective out of the box. I tried resoldering the accelerator multiple times to rule out user error. It would work, but the screen would be fuzzy when sped up. Anyway I bought it a second time to place in my gameboy advanced. And it absolutely works wonderful. And it's super sweet for old pokemon games.

Installed 6 of these in various GBA SP consoles - they work just as advertised and never any issues.

I bought the GBAccerlerator for original GBA, installation was not to difficult. The GBAccerlerator works great with some games while other games (for example Pokemon Ruby) the game crashes at Ultra speed. Be aware the main problem I found with this product is to go back to Normal speed you have to first trough the other speeds Normal speed -> Fast -> Ultra -> Slow Motion back to Normal for some games this does not work because of the Crashes at Ultra speed. Wish there was an option to go down in Clock Speed.

Awesome little mod you can install yourself, a must have for anyone modding their GBA. Works fantastic, fast post to australia, couldnt be happier. Cheers

You’ll need some tools and bit of patience but it works miracles worth every penny Fast Shipping too

It's a solid board and it works great! It's really cool to overclock your Gameboy to get through turn based games much faster. On the SP, I had to trim down the Plastic that holds the nut for the battery cover. After installing, I would recommend buying a solder heat gun. The pads of the crystal you have to remove are underneath the chip and almost impossible to remove with a soldering iron and solder wick. With the heat gun it took less than 30 seconds to remove.