Main Features: through Bluetooth connection or audio line input, or USB flash drive or -SD card. Record audio from Bluetooth or audio line input to digital mp3 file, and save in USB driver or -SD card. New Function: solved the problem of many audios which cannot be download, with our 221, you can one button record (download) the audio to a USB Flash disk or TF card, very very convenient and useful, especially to many mums who want to play the audio to kids but do not want the kids to see the video which will harm the eyes. such as you can download your phone's English listening, stories, nursery rhymes, etc. to our product and play back it directly, to your kids at any time anywhere without keeping the phone playing all the time or worry the kids to play phones, really very convenient, get one to try, you will love it much SPECIFICATIONS: Interface: USB 2.0 Audio Input: Bluetooth, 3.5mm audio jack Audio Output: Speaker, 3.5mm earphone jack User Interface: Button - POWER/MODE, PREVIOUS, , VOLUME+/-, PLAY/STOP, RECORD/STOP. Status indicators. Storage Media: TF card, USB flash drive, supports FAT32 and exFAT format, max 64GB. NFTS is not supported. Record Format: .mp3 Record Quality: 160kpbs Record File: about 1.2MB/minute, 70MB/hour. Play Format: mp3, ape, flac, wav, wma Speaker: 4 3W x1 Power Supply: 1200mAh 18650 lithium battery inside, USB-C port for charging - 5V2A charger is not included. size: 178 x 60 x 70mm Material: Plastic colour: blue Package Contents: 1 x Bluetooth Speaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.