Features - Portable Bluetooth Speaker,built-in bluetooth 5.0 wireless transmission, working distance up to 100ft - Compatible with all Bluetooth devices such as smart phones, tablet PCs - Can match the personal computer, MP3,MP4, and is equipped with 3.5mm stereo audio output interface of the mobile phone and other audio equipment - 4 speaker driver, big power 60W, heavy bass guide tube design - Support TF/SD Card music playback - Support USB Flash Drive music playback - Support AUX line-in connect - Support FM radio, FM channel automatic or manual control - Support Digital Display+Intelligent Remote Control - Support for microphone connection - After shut down automatically memory track number Specification Product type: A21 bluetooth speaker Speaker output power:20W*2+10W*2 Speaker driver size: 3"*4 Frequency Response: 80Hz-20KHz Input voltage: DC 5V Product size: 6*8.3*11.8inch Playing Time: about 6-10hours (depends on playing volume) Battery ?Capacity: 8000mAh Function: Bluetooth, MP3 music player, FM radio, TF Card, AUX, USB music player, Remote control, EQ, Karaoke Suit for: Computer/MP3/MP4/Smart Phone Package list 1 x A21 Bluetooth speaker 1 x Remote control (needs2*AAA batteries, No included) 1 x AUX cable 1 x USB cable 1 x User manual