Size: 120 x 63 x 18mm
Battery: Two AAA(Not included)
This is a dual purpose checker, it checks both quartz watches and button batteries.
Simply put the watches on Quartz Impulse Checker to tester.
For Button Battery Checker:
Put the battery onto the battery checking plate position for testing, ensure positive (+) side is downward.
Press down the button, battery level lights will show the voltage.
Yellow light = Need to Renew, the voltage is weak.
1st green light = Low, 1.05 volt.
2nd green light = Good, 1.55 volt.
3rd green light = Good, 3.00 volt.