Multi-function real-time detection: DC Voltage detection, On-off testing, Resistance test, data hold. Compact body and easy to carry. Voltage detection: The GD181 Detect the DC voltage. On-off testing, Find break points: If the wire resistance is below 500Ω, the buzzer be prompt. HD LCD backlight screen: High definition LCD display, suitable for measurement in environments. Environmental conditions for use:CAT.III 300V Display: LCD display Range of voltage detection: DC 0.8-100V Accuracy: ±(reading+5 word) Working temperature and humidity:0-40°C(Less than 80% RH,Less than 10°C Non-condensing) Storage temperature and humidity:-10-60°C(Less than 70% RH, remove the battery) Maximum allowable voltage between the measuring terminal and the Earth:300V Sampling rate: about 3 times/sec Indication of excess range:display"OL" Power Supply: 1x1.5V AAA battery(not included) On off detection: 2000Ω/less than 50Ω, buzzer prompt Automatic shutdown: Yes Low battery indication: Yes Buzzer prompt: Yes Backlight: Yes Flashlight: Yes Color: Black Material: plastic Package Contents: 1 x Car Voltage Detector Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.