<b>General Description:</b><br> This Christmas Light Tester allows you to easily find any burned out bulbs on your Christmas lights.You can locate it to your Christmas light string problem.It can test bulbs, fuses, and the light strand.<br>It incorporates a bulb remover which you can use to remove bulbs from Christmas light set easily.<br><br><b>Features</b><br> 1.Non-contact AC voltage detection<br> 2.Adjustable detection sensitivity<br> 3.Audible and visual indication<br> 4.Test fuse<br> 5.Tests bulb<br> 6.Retractable light bulb remover<br><br> <b>Battery replacement</b><br> If the LED dose not flash when the built-in buzzer sounds,the button cells are low and should be replaced immediately.<br>To replace the button cells,set the function switch to the "OFF" position first,then press and slide the pocket clip&battery cover out.<br> Replace the exhausted button celles with two new 1.5V LR44 button cells according to the polarity indication.Reinstall the pocket clip&battery cover.<br><br> <b>Note:</b><br> 1.The instrument's AC voltage detection range is:12Vac-600Vac,at 50/60Hz.Don't use the instrument to detect an AC voltage below 12Vac or above 600Vac,do not use the instrument to detect DC voltage.<br> 2.If there are several lines,such as 2-phase wires and 3-phase wire,seperate them far enough apart from each other and perform voltage detection on each line.<br> 3.Always check the instrument on a known AC power source before detection.<br> 4.Don't not use the instrument if it is damaged or operates abnormally.<br> 5.Shielded live conductor will not be detected.<br> 6.Because the instrument's detection limit and sensitivity setting can effect detection,a line(or a device) under test may be live even if the built-in buzzer does not sound and the LED does not light.<br>To avoid electric shock and personal injuiry,don't touch any conductor with hand or skin.<br> 7. To avoid false alarm,don't use the instrument in intense electric field environment.<br>