Item Type: MP3 Music Player Set Material: Aluminum Alloy Weight: Approx. 47g/ 1.7oz Interface: 1x Mini USB, 1x 3.5mm/ 0.1in, 1x Memory Card Slot Storage Type: Memory card (supports a maximum extension of 8GB(not included in the list) Battery Type: Built-in 250mAh Lithium Battery Working Hours: more than 5 hours Package List 1 x MP3 1 x Earphone 1 x USB Cable Please note that the product cannot be connected to a computer.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1Light in weight, portable and easy to carry, can be used for outside activity. 2Backclip design, can be fixed firmly on your cloth or other devices, also suitable for sports. 3Long battery life, can play for more than 5 hours, more convenient to use. 4Builtin memory card expansion slot, supports a maximum extension of 8GB. 5Adopt high quality aluminum alloy material, more durable, provide longer service life.