Product: U Disk MP3 Player Play time (hour): about 10 hours Standby time (hour): 48 hours Size: 8.5*2.5*0.9cm Color: Black, Blue, Pink, White, Green Material: Plastic Battery capacity:80 mA Mode of operation: keystroke Interface: USB 2.0 Headphone interface: 3.5mm Built-in Battery type: special lithium battery Package Included: 1pc MP3 Player Feature: Digital music player supporting MP3 and WMA music format. Built in rechargeable lithium battery, full music can be continuously played 10 sound quality, perfect music enjoyment. Support MP3, WMA format music files. Built in high energy rechargeable battery. Fashionable and compact shape design, exquisite workmanship and exquisite gifts. Note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!