Bluetooth handsfree kit bluetooth version bluetooth 30 talk time 20 h standby 1 000 h mobile charger call functions multipoint call waiting pairing redialing dimensions lxwxh 13 x 5 x 14 cm number of controllable devices 2 call response button transmission mode duplex full duplex series supertooth crystal power supply li ion assembly types sun shield dashboard audio functions voice recognition display oolored display screen