1. Supports Security Digital Memory Card, TF card, USB disk, FM, etc. 2. Supports Line IN function, receiving the audio source from MP3, MP4, PC, Notebook, Phone, etc. 3. Supports USB2.0 high speed transmission, fully compatible with USB1.1 4. Made of high quality fluorescence surface aluminum alloy, elegant and stylish in appearance. 5. Good sound quality lets you indulge in your favorite music. 1. Function Buttons: on/off, menu, previous song, next song, play/pause, volume control. LED display panel. 2. Built-in high capacity rechargeable battery, support long play. 3. Compact and portable, convenient to carry. Specifications: Item Size: 50*50*50mm Material: Aluminum alloy Power source: Li-ion battery / DC5V SNR: more than 80dB Music format: MP3 Color: Green, Red, Blue, Silver Package Included: 1 x Mini Portable USB Speaker 1 x 3.5mm Audio Cable 1 x USB Charger Cable