GTXR & AVAKA BZ20 PLUS Electric Folding City Bike Frame aluminum alloy frameWaterproof IP54Battery 48V 15AHMotor 48V 500 WTransmission 7 speedRiding mode 1-pure electric 2-electric power 3-pedal ridingRemote control battery LCDDrive mode rear driveBrakes front and rear disc brakesSeat...