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. Can also be used as a SD/TF card reader Fashionable and compact shape design, exquisite workmanship and exquisite gifts. Specifications Model: strip MP3 Play time (hour): about 10 hours Standby time (hour): 48 Size: 8.5*2.5*0.9cm Weight: 17.9 g Color: blue Battery capacity:260 mA TheSupport 2/4/8/16GB/32GB SD/TF card (Memories are not included) Mode of operation: keystroke Interface: USB 2.0 Headphone interface:3.5mm Support audio format:MP3 Built-in Battery type: special lithium battery Package Contents: 1 x MP3 Player 1 x rope Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.