DescriptionWhen the quartz watch stops moving, simply put the watch on this checker for earching the defective parts. This checker can immediately indicates where is the problems without removing the watch cover back. If you need it, come and have a try, it will not let you down.Features:This is a dual purpose checker, it checks both quartz watches and button batteries.With this detecting tool, you do not need to removing the watch cover back or separate the watch to check, you just need to put it on this tool.Whether you are a professional watch repairer or just a watch lover, this product is indispensable.Easy to operate: For the quartz impulse checker function, you just need to push the switch upward, then put the quartz watch or movement on the "Watch Dial Position" for testing. For the button battery checker function, you need to put the battery onto the"Battery Checking Plate Position" for testing, and ensure Positive(+)side is downward then the battery level lights will indicate the voltage.Portable size and easy to carry, you can share this tool with your family and friends to use together.Specifications:Material: ABSPower: 2 * AAA battery (NOT INCLUDED)Battery level lights:Yellow light: Renew is necessary,weak voltage.1st green light: Low, 1.05 volts.2nd green light: Good, 1.55 volts.3rd green light: Good, 3.00 volts.Package size: 120 * 63 * 18mm / 4.7 * 2.5 * 0.7inPackage weight: 80g / 2.8ounce