Features: AC Voltage Detection: When bringing the probing end of the voltage tester close to an AC voltage source, the red signal indicator light will flash. The stronger the signal, the faster the red light flashes.Simultaneously, the beeping sound of the buzzer will increase in frequency as the signal strength intensifies. Flashlight Illumination: LED lighting for convenient voltage detection in dark environments. Circuit Breakpoint Detection: When the breakpoint in the circuit is detected, the pen stops flashing and buzzing. Low Battery Warning: When the battery voltage is low, the power indicator light will flash, indicating the need for timely battery replacement. Automatic Power Off: The voltage tester will automatically shut down after approximately 5 minutes of no signal detection or inactivity to extend battery life. Inductive Field, Non-Contact Voltage Detection (NCV): CAT Ill 1000V overvoltage category, using a non-contact high-sensitivity sensor for safe, rapid, and contactless high-voltage detection. Specifications: Model: HT85 Material: ABS Display: LED Range of Voltage Detection: Sensitivity: AC50~1000V Frequency: 50/60Hz Alarm Mode: Sound and light alarm Probe Shape: Prolate shape Live and Neutral: According signal strength indication, the test signal on the fire line is stronger than neural's Signal Intensity Display: LED from low to high, green change red Signal Intensity Indication Method: Sound from slow to fast Flashlight: Yes Auto Power-Off: No operation, no sensing signal will shut down automatically in about 5 minutes Low-Battery Indication: Yes Power Supply: 2 * 1.5V AAA batteries (Not included) Operating Temperature: 0~40 Storage Temperature: -10~50 Humidity: ≤95% Altitude: ≤2000m Safety Compliance: CAT.III 1000V, CAT.IV 600V, CE Item Size: 146 * 24 * 27mm / 5.74 * 0.94 * 1.06in Item Weight: 29g / 1.02oz Package Weight: 41g / 1.44oz Package Size: 15.2 * 4 * 2.6cm / 5.98 * 1.57 * 1.02in Package List: 1 * AC Voltage Detector 1 * User Manual (English)