Size/ Weight
                                        Product size:190x48x66mm
                                        Product weight:516g (including the lithium battery)
   Basic parameters                     Speaker type Bluetooth Speaker
                    Speaker system Dual-channel + Bass
                    Active/Passive Active
                    Operate mode Button
   Features   Wireless Bluetooth music playing
  TWS technology supported to make the sound stereo
  Supports up to 32 GB Micro-SD card
  Built-in 4000mAh lithium battery
  Aux-in jack and 3.5mm audio cable for non-Bluetooth devices
  Built-in Mic for hands-free calls
  Technique                 Parameters                    Loudspeaker 43mm dual full range loudspeaker, 45mm Dual Super-Bass, 50*90mm Rear Super-Bass
                   Output Power 30W
                   Frequency Response 50Hz~20KHz
                   Bluetooth version 4.2
                   USB specification USB2.0 compatible with USB1.1
                     File format APE、MP3、WMA、WAV、FLAC
  Packing content             A20 Speaker 1pc
                 3.5mm audio cable 1pc
             USB power cable   1pc
       User manual  1pc