If your device use Alkaline battery AA or AAA, then each piece is 1.5V, 2 piece choose 3V, 3 piece choose 4.5V, 4 piece choose 6V, etc. DC Outputs
AC to DC Adjustable Voltage Power Supply Adapter 3V 4.5V 5V 6V 7.5V 9V 12V CS
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Output 9V 2A AC adapter for PC Engine SuperGrafx for PCE Super Grafx game console power supply
Manufacturer: TP-Link Model : T090060-2B1 SKU: 173185 Part Number: T090060-2B1 TP-Link T090060-2B1 AC Adapter 5V-12V. Info AC Input: 100-240V 50-60HZ.
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