Portable audio playing device or audio and video playing device e.g. multimedia player for computer, has memory medium e.g. flash memory, storing audio and video data, where periphery of device is calculated using specific formula

摘要

The playing device has a housing made of plastic. Contours running in length and breadth directions are arranged parallel to each other. A memory medium e.g. flash memory or memory card, stores audio and video data using a compression method. The device has a shape or form described by a ratio between length and breadth is of 1:5-2:1, where a periphery of the device is calculated using a formula, which gives a summation of twice the breadth and twice the length of the device. A ground surface of the device covers a projection of the device on a chest of a person.