Multitester tested for voltage. This is an ORIGINAL factory Genuine HP brand AC input: 100-240V and DC output: +32V 1560mA. Triple round barrel PURPLE connector. Hewlett Packard adaptor, adapter, transformer, powersupply, power supply, is compatible for the following (and others):
| Deskjet 6540 (North/Latin America, Asia Pacific) | C8963A, C8963AR |
| Deskjet 6540 (Western Europe) | C8963B |
| Deskjet 6540 (Japan, E. Europe, Middle E./Africa) | C8963C |
| Deskjet 6540 (Asia Pacific) | C8964A, C8964AR |
| Deskjet 6540d | C8964B |
| Deskjet 6543d | C8964C |
| Deskjet 6548 (China and India) | C8964D |
| Deskjet 6540dt (North America) | C8965A |
| Deskjet 6540xi (North America) | C8966A |
| Deskjet 6520 (North/Latin America, Asia Pacific) | C8967A |
| Deskjet 6520 (Western Europe) | C8967B, C8967BR |
| Deskjet 6520xi (North America) | C8968A |
| DESKJET 6840 (NORTH/LATIN AMERICA) | C9029A, C9029AR |
| DESKJET 6840DT (NORTH/LATIN AMERICA) | C9030A |
| DESKJET 6840 (ASIA PACIFIC) | C9031A, C9031AR |
| DESKJET 6840 (WESTERN EUROPE) | C9031B, C9031BR |
| DESKJET 6843 (E. EUROPE, MIDDLE E., AFRICA) | C9031C |
| DESKJET 6840XI (NORTH AMERICA) | C9033A |
| HP DESKJET 6540 | C9052A |
| Photosmart 8450 (North/Latin America and AP) | Q3388A, Q3388AR |
| Photosmart 8450 (Western Europe) | Q3388B |
| Photosmart 8453 (Eastern Europe) | Q3388C |
| Photosmart 8150 (North/Latin America and AP) | Q3399A, Q3399AR |
| Photosmart 8150 (Western Europe) | Q3399B, Q3399BR |
| Photosmart 8153 (Japan and E. Europe) | Q3399C |
| Photosmart 8150v (North America) | Q3400A |
| Photosmart 8150xi (North America) | Q3401A |
| Photosmart 8150 (North/Latin America and AP) | Q3402A |
| Photosmart 8150xi (North/Latin America and AP) | Q3403A |
| Photosmart 8450xi (North America) | Q3480A |
| Photosmart 8450v (North/Latin America and AP) | Q3481A |
| Photosmart 8450 (North/Latin America and AP) | Q3482A |
| Photosmart 8450xi (North/Latin America and AP) | Q3483A |
| Photosmart 8450v (North/Latin America and AP) | Q3484A |
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