Battery Specification: Lithium Battery Signal Noise Ratio: equal 60dB Audio Format Support: WAV Audio Format Support: MP3 Model Number: MP3 Player Operation Mode: Touch Tone Battery Life: Less than 10 hours Style: MP3 Storage Type: Flash Memory Function: Build in Speaker Body Material: Plastic Have Speakers or not: Yes Display Size: None External Memory: Yes relate 2: mp3 player mini relate 3: mp3 player usb relate 4: usb mp3 module relate 5: mini sd card MP3 player relate 6: Build-in Li-ion rechargeable battery relate 7: player mp3 platic relate 8: cassette player mp3 relate 9: 4-5 hours Play time relate 10: Mini USB Clip MP3 Player #MP3 #Plug-inMP3 Material:plastic colour:Blue Package Contents: 1 x Mini MP3 Player 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. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.