Features:

• AC power adapter for Casio musical keyboards
• Works with Casio SA-39, SA-6, SA-65, and SA-67
• Works with AC 120V, 60 Hz power outlets

Editor Reviews:

Product Description:
Specifically designed for use with Casio SA-series Music Keyboards

Amazon.com Product Description:
Designed for use exclusively with Casio's SA-39, SA-6, SA-65, and SA-67 musical keyboards, the AD-1 lets you conserve batteries by plugging your keyboard into an AC power outlet whenever possible.

Rating : - Inexpensive power supply for the Casio SA75 keyboard
I've tried it a few times with no problems. Just make sure to press the jack all the way in for a secure connection.