Maxwell 1. The tester cannot be used to test voltages above the specified nominal voltage! 2. The perfect signal is only provided in the temperature range of -10 to (+50)°C and in the frequency range of 50 to 500 Hz. 3. Signal perception may be impaired under unfavorable lighting conditions (e.g., in sunlight). 4. Before use, check that the tester is functioning properly (AUTO TEST). 5. Do not use the tester in the presence of moisture! (This includes dew, fog, or rain.) 6. Use the phase pencil blade only for voltage testing. It is prohibited to perform any other work without disconnecting the voltage! Do not use a damaged tester! Please note that under certain conditions, static electricity may be generated on the plastic body, which may cause incorrect readings (signals)! Electric Handheld Tools