Genuine Texas Instruments AC-9175 AC adapter in its original Texas Instruments Accessory box. Adapter label reads Model SA A30650, Class 2 Transformer, Input 120V 60Hz 7W, Output 6 VDC 500 mA, Made in Taiwan. Box marked Copyright 1990 Texas Instruments, Assembled in Taiwan. Adapter looks clean; the box shows corner wear, scuffs and a red dot sticker. Not tested.

The polarity symbol is printed on the adapter label (pictured) so you can match it to your device.

A replacement power supply for Texas Instruments calculators that call for the AC-9175 — check your manual for the model number.