Description: The generation non-contact voltage testers are easy to use - just touch the tip to a terminal strip, outlet, or supply cord. When the tip glows red and the unit beeps, you know there is voltage . Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or . Specification: Material: ABS Frequency Range: 50 to 500 Hz Color: as shown Test Voltage Range: 90-1000V AC Safety Rating: 1000V, IV Package Contents: 4PCS 1AC-D measuring 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.