Features 1、Contact Type: This is a contact type electric test pen, easy to operate and convenient to carry. It can bring a lot of help for your work. 2、Operating Procedure: NCV inductive probe for alternating current voltages is applied. Simply place the tip near a terminal strip, outlet or power cord. You can know there is voltage when the tip is red glowing and the tip makes a beeping sound. 3、Breakpoint Testing: The test detector automatically detects wires or neutral wires. Perfect for breakpoint testing. 4、Red and Green Lighting: This test pen will beep at a higher frequency. Meanwhile, the screen is red or green, red means high voltage and wires are detected, green means low voltage and empty wires are detected. 5、Scope of Application: More sensitive and flexible measurement. Press the S button to adjust the sensitivity, and adjust the low range for thermostat, irrigation wiring, etc. Specification Item Type: Voltage Tester Pen Model: HT89 Material: ABS Battery: 1.5V AAA battery x 1 (shipping without battery) Use: Electrical parameter detection AC Voltage: 12 - 300V, 50 or 60Hz Measurement Error: ± (5% + 3) Operating Temperature: 0 - 40°C Storage Temperature: -10 - 50℃ Humidity: ≤95% Altitude: ≤2000m Package List 1 x Voltage Tester Pen(Shipping Without Battery) 1 x Manual