ER1870G Features Supports FM transmitter Directly play music from USB flash drive Supports an external TF card up to 16GB Green backlight screen with song title display Supports standard USB2.0 interface General Specs Brand & Model 658 FM Frequency 87.5-108.0MHz Interface USB2.0 Card Slot Supports an external TF card up to 16GB Voltage 9V-24V Package Details Weight: 120.91 g Size: 19.2*11.3*4.00 cm Package Includes * Car MP3 Player