The whole machine is 17cm long, 7.5cm wide and 1.5cm thick. In terms of audio and video, AEAPPLE Aiyipu AP21 supports video formats such as RMVB, AVI, ASF, FLV, 3GP and MP4. Some formats can also support video playback with up to 11M code stream; Automatically save movie bookmarks. In terms of audio, it supports MP3, WMA, WAV, AAC and other music formats, as well as FLAC and APE audio formats. In addition, AEAPPLE Aiyip AP21 has the function of a 2-megapixel digital camera, which supports still shooting and dynamic continuous shooting (DV shooting). Clearly capture the wonderful moments of life, DV selfie is more personalized and supports video output. Support JPG (picture/photo) browsing function, used to browse photos of various digital cameras, support EXIF2.1. Support external T-FLASH card to expand storage space. Support alarm clock, perpetual calendar and time display. Support double-threaded tasks, LRC lyrics display, and you can read e-books while listening to songs.