The MP3 player has long standby time because of its high-performance rechargeable battery. The use of ultra-small size and lavalier design enables it to be clipped at will.MP3 player also has mobile flash drive function to store MP3 songs or data anytime and anywhere. It is easy to use without external power supply because of its hot plug and play design.It is made of high-quality metal material, which is wear-resistant and durable.The length of the product is 4.3cm, the width is 2.3cm and the height is 1.4cm.It is very suitable for student, sports, running and travel, etc.Item Name: MP3 PlayerMaterial: MetalInteface: USB1.1/2.0Headphone Jack: 3.5mmBattery Capacity: 90mAh (Included)Supported Audio Format: MP3Memory Card Type: TF Card (TF Card Not Included)Endurance Time: 4 HoursCompatible Platforms: for Win98/SE/ME/2000/XP or AboveFeatures: Portable, Metal Clip Design, Long Standby TimeSize Details: 4.3cm x 2.3cm x 1.4cm/1.69" x 0.91" x 0.55" (Approx.)Notes:Due to the light and screen setting difference, the item"s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x MP3 Player (Charging Cable Not Included)