Bluetooth Chips：山景 MVSILICON BP1048B2, Bluetooth：V5.0, Protoco:A2DP AVRCP ACDTP HSP HFP, Two channel stereo audio Power: 40W Frequency:80Hz～20KHz, Speaker:66MM/round（2.5 inch） 4Ω, Battery：2200mAh x4(8800mAh), Music time：10 hours Chargin port: USB C, DC5V/2A Output/ charge phone: 5V/1A Chargin time: 6-8 hours Unit Size：250MM*103MM*103MM, Accessories: Audio cable, charging cable