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: Metal Color: Shown As Pictures Pneumatic Test Range: 0.3-6.0bar Maximum Test Diameter|: 65mm/2.6inch Maximum Test Height: 72mm/2.8inch External Air Pressure Connection: 6N Cylinder Maximum Pressure: 10 bar Cylinder Outer Diameter: 80mm/3.2inch Cylinder Inner Diameter: 65mm/2.6inch Cylinder Height: 138mm/5.4inch Size: Approx. 24 * 14 * 27cm/9.5 * 5.5 * 10.6inch Weight: Approx. 3800g Package List: 1 * Watch Waterproof Tester Principle: 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 possible 2. Loosen two screws and remove the lid 3. Pull water into it until reaching the designated red line of the bucket 4. Hang your watch on the pole 5. Fix the lid and tighten the screws 6. 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 watch 7. Press down the pole, let the watch immersed in water, press down the exhaust button, let the air out 8. 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.