Product information:

Bluetooth version: V3.0+EDR
Frequency: 20h-20KHZ
Sensitivity: -42db +/- 3db 360
Voltage: 5V +/- 0.5
Working current: 45ma (maximum)
Standby current: 25mA (maximum)
Effective distance: 5m
RF output: 4dBm

Packing list:

1 x car FM transmitter
1 x audio cable
1 x User Manual