Product Review

Detailed instruction for bullet points :
1. Adjusting frequency and volume: Supported frequency of the wireless radio adapter from 87.5 - 108.0 MHz. The key of CH is to adjust the frequency mode and key of < and > is to adjust the volume.
2. Playing music from TF card and smart mobile phone: Insert the TF card into the car device, it will detect and play the MP3/WMA/WAV music automatically. Select songs by pressing < and >. Support A2DP function. Similarly, it will transmit the signal to car stereo to play music from your phone. The music volume/ play / pause/ previous/ next can be operated either on mobile or on the mini bluetooth device. Long press CH can switch the file source
3. Connection to Bluetooth devices and memory function: equipped with built-in Bluetooth chip. The pairing function will be activated automatically when it's on. Memory function design allows it to automatically connect to its memorized paired Bluetooth device
4. Charging handheld devices in car: Integrated car USB charger of output 5V - 1000mA is available and you can charge handheld devices in car.
5. Make/answer a handfree call: support Bluetooth hands-free phone calling for build-in microphone. Noise and wind can be suppressed to create full duplex sound quality by CVC technology. Redial a last number by double clicking the call button and reject call by pressing the call button for about 5 seconds.

Parameters:
Bluetooth:
Bluetooth version: V 3.0 + EDR
Frequency: 20 h - 20KHz
Voltage: 5 V + / - 0.5
Effective range: 5 meters
Frequencies:
FM: 87.5 MHz - 108.0 MHz
Effective range: 2 meters
Size: 15 x 5 x 3.5 cm
Weight: 1.49 oz