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| Specifications | NT-309 |
| Test Voltage range | 12V~1000VAC, 50/60Hz |
| Auto power off | 3 minutes |
| Low battery indication | Yes |
| Alarm system | Flashing LED with Beeper alarm |
| LED light indicator | Yes |
| Power | 2 x 1.5V AAA (not included) |
| Dimension | 156x23x26mm |
| Weight | 35g |
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