1、Can detect quartz watch, also can detect button battery, meeting different demands. 2、Simple operation, convenient and practical for watch repairing work. 3、Reliable "QC" tester for watch manufacturers and watch assembly plants. 4、Tester tool powered by 2pcs AAA battery (not included), high sensitivity. 5、Lightweight and compact, very convenient to carry and storage. Condition: 100% Brand New Item Type: Watch Battery Check Material: ABS Battery: 2pcs AAA (not included) Operation method: 1. Up switch. 2. Quartz watch or movement placed in the "dial position" for testing, will appear one of the following results (A) No sound or green light: = Battery or electronic parts in poor condition. Solution: Check/update batteries and retest. If still unresponsive, check/update the electronic parts or complete the move. (B) If there is a sound and the green light flashes, but the hands of the watch do not move: = Battery and electronic parts are in good condition, but mechanical parts are in poor condition. Solution: Inspect/update mechanical parts and retest them. If you still don't respond, restart the entire motion. (C) If a sound is heard, the green light flashes and the hands of the watch move: = Quartz watch or movement in good condition. Button batteries 1. Press the switch. 2. Place the battery on the battery inspection board for testing;Make sure the positive pole (+) is facing down. The first green light is low, 10.5 volts. Second green light = ok, 1.55 volts. Green light = good, 3.00 volts. 1 x Watch Battery Check