ER2730S Features Features an LED display Equipped with a standard USB 2.0 port Can play music from a TF card or USB flash drive Freely select to play from multiple folders Conveniently charge your digital devices via the USB port Supports an external TF card up to 32GB Main Features Brand & Model S003   Display Type LED Audio Format WMA， MP3 Card Slot Supports an external TF card up to 32GB USB 1 x USB2.0 port Voltage 12V-24V Package Details Weight: 67.41 g Size: 18.7*12.5*6 cm