Used for only about 2 hours. Due to its thickness, I will ship it without the plastic case. Please be aware of this. (The photos are everything that is included) This is a Bluetooth(R) FM transmitter that allows you to wirelessly enjoy music from your smartphone or tablet in your car. You can listen to music, as well as the audio from navigation apps and video content, through your car's FM stereo. It supports SCMS-T, a content protection standard, so you can also listen to one-seg audio. You can select from 4 transmission frequencies: 88.1/88.3/88.5/88.7MHz. It has a last memory function that remembers the last used frequency even when the engine is turned off. It supports 12/24V vehicles. You can use it directly in large vehicles such as trucks without using an adapter. It has one USB port that can charge smartphones and tablets at 2.4A.