(31)The information requirements should be adapted to take into account the technical constraints of certain media, such as the restrictions on the number of characters on certain mobile telephone screens. In the case of mobile telephone screens, where the trader has customised the content and presentation of the online interface for such devices, the following information should be provided upfront and in the most prominent manner possible: information concerning the identity of the trader; the main characteristics of the consumer financial service; the total price to be paid by the consumer to the trader for the consumer financial service including all taxes paid via the trader or, when an exact price cannot be indicated, the basis for the calculation of the price enabling the consumer to verify it; and the existence or absence of the right of withdrawal, including the conditions, time limit and procedures for exercising that right. The rest of the information could be layered. However, all the information should be provided on a durable medium before the conclusion of the distance contract.