Electric Socket Wall AC Power Outlet Detector Sensor Tester Pen 90-1000V generation AC non-contact 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 . Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or . A perfect tool kit and electric industry uses. perfect design for testing power cables, , wall sockets, junction boxes, fuses, etc Frequency Range: 50 to 500 Hz Test Range: 90-1000V AC Safety Rating : II 1000v Powered By: 2 x AAA Batteries (Not included) Just press the button, white LED light can be always on when there is absence of Net weight: 40g Colour:yellow Material:ABS plastic Size:152 x 22 x 17mm Package Contents: 1 * LED Light Alert Pen(' 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.