... for last frequency,It will mute the music during calls and resume playing music after calls.6.Built-in lithium batteries ... with USB cable for charging.8.Compatible with iPhone,Ipod and support all audio sources with 3.5mm jack, such as ... , MP4 etc.9.With 3.5mm Plug,Plug can shrink, and more convenient. (the weight 20 g, 11 MM thick, ... 130*80.5*21mm *Net weight:20g,Gross:61g handfree and car FM transmitter