Features: Record audio from BT or audio line input to digital mp3 file, and save in U disk or TF card. Play music through BT, audio line input, U disk or TF card. It solves the problem that many audio cannot be download, you can one button to record (download) the audio to a USB flash drive or TF card, convenient and useful. Built-in 1200mAh lithium battery, long endurance time. Wide application, any audio you like can be saved locally through it, and then you can directly enjoy the local, or share with friends. Specification: Interface: USB 2.0 Audio input: BT, 3.5mm TRS audio jack Audio output: Built-in speaker, 3.5mm TRS earphone jack User interface: Button-Power/Mode, Previous song, Next song, Volume+/-, Play/Pause, Record/Stop. Status indicators. Storage media: Micro SD card and U disk. Support FAT32 and exFAT, max 64GB, not support NTFS format. Record format: mp3 Record quality: 160kbps Record file: About 1.2MB/minute, 70MB/hour Play format: mp3, ape, flac, wav, wma Speaker: 4 3W*1 Battery capacity: 1200mAh Item size: 17.8 * 7 * 6cm /7.01 * 2.76 * 2.36in Packing list: 1 * Speaker 1 * Charging cable 1 * User manual