Function: Built-in memory card expansion slot, supports 32GB maximum expansion. The extremely lightweight player can be clipped to clothes or other devices and stay in place for hassle-free sports. Long battery life, can play for more than 5 hours, you no longer have to worry about running out of power. With mini LCD display you can clearly see the progress of the song, more convenient to use. Adopt high quality aluminum alloy material, more hard and durable, ensuring longer service life. Specification: Item Type: MP3 Player Set Material: Aluminum Alloy Weight: Approx. 47g/1.7 oz Display: Mini LCD screen Interface: 1xMini USB, 1x3,5mm/0,1 inch, 1xG Memory Card Slot Memory Type: Memory card (supports a maximum extension of 32 GB (not listed) Battery type: built-in 250 mAh lithium battery; Hours of operation: more than 5 hours List of packages: 1 x MP3 1 x Headphones 1x USB cable