Features: 1. It is convenient for you to observe which part of the watch is not water proof with the transparent cylinder.2. Designed for testing the water resistance of the watch cases.3. The air pressure can be adjusted up to 6 ATM, which means you can test watch with water proof level not above 6ATM. 4. Can test two watches at one time.5. Easy for you to operate.Specification: Material: MetalColor: Shown As PicturesPneumatic Test Range: 0.3-6.0barMaximum Test Diameter|: 65mm/2.6inchMaximum Test Height: 72mm/2.8inchExternal Air Pressure Connection: 6NCylinder Maximum Pressure: 10 barCylinder Outer Diameter: 80mm/3.2inchCylinder Inner Diameter: 65mm/2.6inchCylinder Height: 138mm/5.4inchSize: Approx. 24 * 14 * 27cm/9.5 * 5.5 * 10.6inchWeight: Approx. 3800gPackage List:1 * Watch Waterproof TesterPrinciple:Pressurization to the sealed box can simulate the state of the product dozens of meters underwater. Pressure difference between the inside and outside of the product will be generated after the pressure relief of the sealed box. Air bubbles can be visually seen in the leaking product.Usage:1. Pull the watch lever as far as possible2. Loosen two screws and remove the lid3. Pull water into it until reaching the designated red line of the bucket4. Hang your watch on the pole5. Fix the lid and tighten the screws6. Shake the pressure lever to achieve 3 air pressure (the official standard of watch industry), and wait for three minutes to let air enter the whole watch7. Press down the pole, let the watch immersed in water, press down the exhaust button, let the air out8. When the pressure drops, observe whether there are bubbles from the watch, if there are bubbles, then the watch sealing is not good, quickly pull the pole and take out the watch. No bubble appears, the watch sealing is very good..Note:After the arrival of the product, please be sure to check whether the air tightness of the product is good, directly use the rocker to pump to increase the internal air pressure, and then wait for half a minute to see whether the value of the barometer has decreased, if not, it proves that the product is good air tightness; If the value changes, remove the four screws of the base, check whether the gas pipe is off, and re-connect the gas pipe to test the air tightness again.