1、Mainly used for watch maintenance repairing, electronic battery test. 2、Powered by 1pc 9V battery (not included), reliable and durable to use. 3、High efficiency and high accuracy, made of quality palstic material. 4、Suitable for watchmakers and watch repairing workers to use. 5、Nice and practical tool for instant testing of your watch battery capacity. 1 x Battery Tester 1 x Testing Cable  Condition: 100% Brand NewItem Type: Watch Battery TesterMaterial: Plastic Usage: Watch Repairing, watch battery testing Battery: 1pc 9V battery (Not included)Battery test instructionsMove the battery type selector to the appropriate position, and then insert the battery positive side down.Press the spring clamp to make contact with the battery to check the instrument indicator. If the indicator is yellow or red, change the battery motor pulse test instructions slide the battery type selector or switches the pulse test.Place the dial face down on the indicator position on the tester.At this time, the tester should beep at 1.5, with a time interval of 10, 20, 30, or 60 seconds, depending on the movement. Battery replacement:When the switches turns on the pulse test and the red light is not on, the tester battery (9V alkaline battery) must be replaced.