really awesome for my car, no complain,

Hey, I got this little Bluetooth FM adapter for old chevy sedan, So far I have been impressed with it build quality and sound quality. nothing negative, its actually smaller than it looks in image. 

anyways here is a detailed info of the productL

FULL-AUTOMATION: Our FM transmitter bluetooth is the only one on the market which can automatically and accurately find blank FM channel after you press “AUTO” button, easier for you to enjoy crystal music or pick up high clear hands-free calls in car, say goodbye to other clumsy FM transmitter. MULTIFUNCTION: Upgrade to 3 USB ports and power off Settings. Two fast charging USB ports support QC3.0 and 5V / 2.4a, which can charge two devices efficiently at the same time. The other one is used for USB music playback.The power off setting protects the car battery without unplugging the radio transmitter. THE MOST HUMANIZATION DESIGN: 1.8’’ Large color LCD screen of bluetooth adapter for car & 360 degree rotatable goose neck to get more comfortable view of the incoming phone number, FM frequency, song name, connected bluetooth device, etc. UNIQUE 5 EQ MODES CUSTOMIZED: The bluetooth car adapter supports 4 music play modes AUX/ BLUETOOTH/ USB/ TF CARD, also you can customize music from USB drive and TF card to normal, classic, pop, rock and jazz EQ style. Adopted CVC and anti- statics technology, create full duplex sound quality, grants you lossless music in car. SAFETY AND WARRANTY: Safety first, LoHi FM transmitter equipped with a voltmeter to show you the condition of your car battery. (Normal value should be between 12 ~ 14.8V, 13.2V ~ 14.7V when you start the engine, 12.2V ~ 12.8V when your car ignition is off). Order now! Enjoy LIFETIME WARRANTY and friendly customer service.

Protect Your Car Battery LDesign FM transmitter no need plug or unplug it from your car socket everytime.

Upgrade Security Protection LDesign FM transmitter bluetooth offers over current / over voltage / shot circuit / smart temperature protection simultaneously.

One Button to Control It

Single click to answer the phone.

Long press to hang up the phone.

When in hands-free call, long Press it can swith to private call.

Single click when music start, pause or playback the song.

Double-click to dial the last number dialed from the phone.

Rotate it when music start can volume it up and down for your need.