A golf club shaft includes a shaft having a tubular wall delimiting an interior space. The format converter comprises a WLAN transceiver for sending and receiving messages to and from the AP; a UMTS transceiver for sending and receiving messages to and from the transceiver in the UMTS; and a translator for translating WLAN messages to UMTS format and UMTS messages to WLAN format. In another embodiment, the browser can include functionality that analyzes previously created and stored projects, to identify repeatedly used effects. The ear piece may be used in connection with a hearing aid, an MP3 player, a cell phone, or the like. The position is determined in dependence on the current actual value of the measurement signal, the extreme value, and the actual values in the first and second end positions.