Long battery life - at half volume via wired earbuds, up to 25 hours of music playback, with a 1250 mAh capacity balancing excellent convenience and function. Portable MP3 player - the MP3 weighs 64 g ( 2.26 oz), equivalent to 8 dollar coins, and is shaped like a pocket card. Formats supported - MP3, OGG, MAV, FLAC, AMR, MID, AAC, APE, etc. Compatible with the ROCKBOX system, by the way what an awesome MP3 it is. Video function - 720p video can be played smoothly, with supported formats including MP4, MKV, MOV, AVI, FLV, and 3GP