Features: Professional tool for watch movement makers and watch assembling factories.Not only checks the quartz watch itself, but also the button batteries.Sound effect ans light indication for clear displaying working condition. Made of quality plastic material, lightweight and durable, convenient for operation. Special designed for watch movement and quartz watch battery testing. Specification: Condition: 100% Brand NewLength: 12cm / 4.7inWidth: 6.1cm / 2.4inFor Quartz Impulse Checker1. Push the switch upward.2. Put the quartz watch or movement on the "Watch Dial Position" for testing, one of the following results will occur.(A) No sound and no green light: Either the Battery or the Electronic parts are in poor condition.Solution: Check / renew battery and re-test.If still no reaction, check /renew Electronic parts or complete movement.(B) If there is a sound and the green light flashes, but the watch hands do not move:The Battery and the Electronic parts are in good condition, but the Mechanical parts are in poor condition.Solution: Check / renew Mechanical parts and re-test.If still no reaction, renew complete movement.(C) If hearing a sound, the green light flashes and the watch hands are moving:The quartz watch or movement is in good condition.For Button Battery Checker1. Push the switch downward.2. Put the battery onto the "Battery Checking Plate Position" for testing; ensure positive (+) side is downward.1st green light: Low, 10.5 volts.2nd green light: Good, 1.55 volts.3rd green light: Good, 3.00 volts.Battery: LR03/AAA size, 1.5Vx 2 (not Included)Package List:1 * Battery Tester.