Portable Wireless Speaker 1.Simple and easy to operate key design 2.Lasting power,long battery life 3.Speakerphone function Stereo wirelessSpeaker Type:Portable Communication:Bluetooth 5.0 Support TF Card USB Baterry: 500mAh Channels:2 (2.0) PMPO:300W Power Source:AC Number of Loudspeaker Enclosure:2 Audio Crossover:Full-Range Built-in Microphone:Yes Output Power:35W Frequency Range:31Hz-3.5KHz Playing Time: 3-4H Talking Time: 3-4H