A method and a device for ranking frequencies are provided. By analyzing biological information of the user, the invention loads an appropriate exercising mode. The item is conveyed, responsive to the order, from the merchant to the buyer, and the advertiser receives a predefined portion of the price paid by the buyer in consideration for posting the advertisement. , the top surface is mounted \u201cup. The plug and the locking element are provided with reciprocally corresponding locking means whereby the locking element can be pivoted for decoupling without the plug pressing on the housing, thereby enabling large caliber tubing, such as those used with construction compressors, to be coupled by hand without tools.