It uses Bluetooth V2.1 + EDR connectivity to stream FM radio, music, and calls through your car stereo system. Built-in microphone allows you to speak to callers without picking up the phone when you are driving. Moreover, it offers a USB output to charge your portable devices. Mini and light, it easily fits in the car.
Specifications:
Bluetooth Version: V2.1 + EDR
Rated Working Voltage: 12V -24V
Limit Working Voltage: 9V -26V
USB Output: 5V/2A
Working Temperature: 0 to 50℃
Play Formats: MP3/WMA
SNR: >60dB
Degree of Distortion: < 0.1%
Frequency Response: 20Hz - 15Khz
Resolution of right and left Channel: > 60 db
Bluetooth Sound Processing: A2DP
Bluetooth Transmission Distance: 10M
Effective Distance of Bluetooth Microphone: 0.5 - 2M
FM Frequency: 87.5 - 108MHZ
FM Mode Stereo Digital PLL Frequency Locking
Material: ABS
Dimensions: (4.33 x 0.98 x 0.67)" / (11 x 2.5 x 1.7)cm (L x W x H)
Weight: 1.20 oz / 34 g
Cheaper on FleaBay
http://www.ebay.com.au/ulk/itm/191724943494