











⚡ Test Smarter, Work Safer – Never Miss a Voltage Beat!
The Klein Tools ET40 Voltage Tester is a compact, battery-powered device designed for precise AC and DC voltage measurement with ±0.5% accuracy. It supports a wide voltage range (12-240V AC, 1.5-24V DC), features bright LED indicators for voltage type and polarity, and is built to withstand drops up to 3 meters. Lightweight and portable, it comes ready to use with included batteries and convenient test lead holders, making it an essential tool for professionals demanding reliability and efficiency.






| Manufacturer | Klein Tools |
| Part Number | ET40 |
| Product Dimensions | 13.31 x 3.86 x 2.82 cm; 65.2 g |
| Batteries | 2 AAA batteries required. (included) |
| Item model number | ET40 |
| Size | One Size |
| Colour | orange |
| Style | 12/240 V |
| Finish | Brushed |
| Material | Plastic Housing, PCB with Electronic Components |
| Pattern | Solid |
| Shape | Triangle |
| Power Source | Battery Powered |
| Item Package Quantity | 1 |
| Measurement Accuracy | +/-0.5% |
| Display style | Analog LED |
| Certification | CE |
| Special Features | DC Polarity Indicators for DC Positive, DC Negative, and Both Illuminated for AC. Tests Low DC Voltage to 1.5V. Built in Test Lead Holders on Sides of Tester. |
| Included Components | Electronic Voltage Tester that tests AC Voltage, DC Voltage, and DC Polarity, User Manual, and 2 x AAA Batteries |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Battery description | 2 x AAA |
| Item Weight | 65.1 g |
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