Product Review: Allsun Christmas Light Tester Non Contact Voltage Tester The Allsun Christmas Light Tester Non Contact Voltage Tester is a great tool for anyone who wants to ensure that their holiday lights are safe and functional. This tester uses non-contact technology to test the voltage of your lights, which can help you avoid accidents like fires or electrocution. The tester also has a built-in light bulb & fuse detector, which makes it easy to identify any issues with individual bulbs or fuses in your string of lights. One thing I really appreciate about this tester is its sensitivity adjustable feature. This allows you to customize the testing range based on the type and size of your holiday lights. For example, if you have miniature lights that require a lower voltage than standard-sized lights, you can easily adjust the tester's settings to accommodate these differences. Another great feature of this tester is its compact design. It's small enough to fit in your pocket or purse, which makes it easy to take with you wherever you go. This means that if you need to test your lights while they're still hanging on the tree or strung up around your house, you can do so without having to unplug them first. Overall, I would highly recommend this Allsun Christmas Light Tester Non Contact Voltage Tester to anyone who wants to ensure that their holiday lights are safe and functional.