1、Watch demagnetizer is the use of alternating power supply to produce alternating magnetic field, to the mechanical table gossamer for demagnetization to reduce the time error and increase service life. 2、The speed of demagnetization is adjustable, which is more practical in use. 3、With quartz tester function to detecte the situation of quartz movement. 4、With battery tester to detecte the battery remaining capacity for you to change battery in time. 5、Brand new battery tester to batteries without even opening the watch case with the help of pulse test. Features: 1. Watch demagnetizer is the use of alternating power supply to produce alternating magnetic field, to the mechanical table gossamer for demagnetization to reduce the time error and increase service life. 2. The speed of demagnetization is adjustable, which is more practical in use. 3. With quartz tester function to detecte the situation of quartz movement. 4. With battery tester to detecte the battery remaining capacity for you to change battery in time. 5. Brand new battery tester to batteries without even opening the watch case with the help of pulse test. 6. Multi functional and necessary tools for watchmakers and watch repairing workers. Specification: Condition: 100% Brand New Item Type: Watch Accessory Material: Plastic Color: As Shown in The Pictures Size: Approx. 11 x 3cm/4.3 x 1.2in Battery: 2 x 1.5V AA Battery (NOT Included) Package List: 1 x Tester