This is the UltraWarp v1.91G Accelerator with 13Mhz oscillator. Designed by Michael Mengel. ReActiveMicro is now an Authorized Dealer and Partner with Michael Mengel in an effort to help bring more great products to the Apple II Community. If we back another vendor's product, you know it's of the highest quality and can be trusted.
The UltraWarp is designed to allow the Apple II/+ and IIe to run at faster than 1Mhz. Standard is a WDC 65816, 16-bit processor. The board comes with a 13Mhz oscillator, however other speeds can be used if you replace the oscillator. “Full” and “Half Can” oscillators can be used, and are able to be purchased from most major electronics part suppliers (or contact Sales)
Note: Running the UltraWarp at faster speeds can cause issues in some scenarios. The card or Apple II won't be damaged, but your programs can crash or lockup.