TopReturn RUIZU X06 100 hours wireless bluetooth Mp3 music player and 4 gb storage and 1.8 inch screen TF/SD card slot support 1-64 gb + headset(Green) Builds in bluetooth transmitter. Except enjoy music by earphone, You can transmitte the music in the built-in flash memory or TF card to your Bluetooth-enabled headphones, headset, or speaker system. Works perfectly with Car via AUX port. (Additional male to male AUX cable is needed) Longtime battery time: up to 68 hours of audio playback Built-in FM tuner: For versatile listening options. Memory card slot for pre-loaded cards up to 64GB