... private conversation and FM transmitter (88.1 ,88.5, 88.7, 89.4MHZ), transfer the sound of music or phone talking ... provide 168 hours standby time and 11 hours phone talking. 7. Built-in high intelligent microphone and powerful speaker.8. hone ... .W. : 9.6kg / ctncarton size: 35.6X 32.2X 37.7 cm Bluetooth Hands-free Car Kit (BY-10088A )