Specification: Condition: 100% Brand New Material: Alloy Color: Shown As Pictures Capacity: 2Watches Maximum Test Height: 15.5cm/6.1in Maximum Test Width: 8cm/3.2in External Air Pressure Connection: 6N Pressure Test Range: 0.3-6.0bar Cylinder Maximum Pressure: 10 bar Size: Approx. 240 * 145 * 275mm/9.5 * 5.7 * 10.8in Package List: 1 * Watch Waterproof Tester Usage: 1. Fill the water tank to the specified level. Distilled water is preferred to prevent calcium deposition. 2. Hang the watch on the hook. 3. Replace the cover and tighten through 2 nuts. 4. Use the lever to increase the pressure to 3 atmospheres (according to the official standard of Swiss watch industry) and wait 3 minutes to watch the air inside. 5. Press the button to let the air escape immediately. When the pressure drops, observe the watch: if almost no bubbles escape from the shell, it is obvious that the seal is not good for escape.In this case, please get the watch out from the water.