Electric Socket Wall AC Power Outlet Voltage Detector Sensor Tester Pen 90-1000VThe generation AC non-contact voltage testers are easy to use - just Press the tip to a terminal strip, outlet, or supply cord.When the tip glows red and the unit beeps, you know there is voltage present.Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or .A perfect tool kit for home and electric industry uses. perfect design for testing power cables, , wall sockets, junction boxes, fuses, etcFrequency Range: 50 to 500 HzTest Voltage Range: 90-1000V ACSafety Rating : II 1000vPowered By: 2 x AAA Batteries (Not included)Just press the button, white LED light can be always on when there is absence of voltageNet weight: 40gColour:yellowMaterial:ABS plasticSize:152 x 22 x 17mmPackage Contents:1 * LED Light Voltage Alert Pen(Don't included battery)Only the above package content, other products are not included.Note: Light 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.