Cars Q&A

Sir,I am looking for a BT speaker for using it in a hatchback-Car.Planning to use only BT speaker in the car and not the regular onboard music system.The following features are desirable in the BT speaker like FM,Call answer feature,Pendrive-Usb connectivity,Aux ,Sd card slot-optional.Have seen such features in-Portronics SublimeH3500 and JBL Tune.Please suggest the best Bt speaker out of above and also any other appropriate model-brand with good sound quality.Regards.