For using the valve below the on/off switch: When activated in the fully inserted state, the preset vacuum is at its maximum. If it is activated before use, the vacuum is at its minimum. The controller is also available as a set with a U.S. vacuum cup. Individually, the controller weighs 163 g (without batteries) and measures 8.2 x 7.7 x 11.8 cm. Additionally, there is a suitable attachment for standard models (8.2 x 7.7 x 5.0 cm and 48 g) or the U.S. adapter (measuring 8.7 x 8.7 x 5.9 cm and weighing 51 g). Shipping is done in a neutral box that gives no indication of the contents. Dispose of the item at the end of its life according to the regulations of your local waste disposal service.