Mini FM Transmitter, SOLIDPIN Universal 3.5mm in Car FM Transmitter Audio Radio Adapter for iPhone, iPad, iPod, Samsung Galaxy Note Edge, LG, Motorola, BlackBerry, Google Nexus, Android, Tablet Newest Version: More stable FM signal, better anti-interference performance, portable size with LED Display Optimized stability: Adopt SMD crystal material, longer life span and optimized stability than other similar products Longer Play: We improve the built-in lithium battery ( no extra power needed), thus it can last 1.5h longer than previous version Auto Power-Off : When no music input for one minute ,it will shut down automatically for the energy saving purpose