Feature: Built-in rechargeable lithium battery, a variety of charging methods. External memory: Supports up to 32GB TF card, and can also be used as Micro SD / TF card reader (without memory). Support music files such as MP3, WMA format. Le can play 10 kinds of sound quality, perfect music enjoyment. The design is simple, refined and stylish. Note: There is no built-in memory. So you need to buy an extra TF card. Product specifications: Standby time (hours): 48 hours Battery capacity: 80 mA Headphone jack: 3.5mm Playtime (hours): about 10 hours Mode of operation: keystroke Built-in battery type: special lithium battery Interface: USB 2.0 Weight: 17.9 grams Size: 8.5 x 2.5 x 0.9cm Specifications: 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. Design is concise, exquisite and fashionable. Fashionable and compact shape design, exquisite workmanship and exquisite gifts. Package Included: 1*MP3 Player Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings. By the way, if you like our store, Please add our store to your Favorite Stores, You can get our New arrival and Discount information in time.