VicTsing Mini FM Transmitter Wireless in-car FM Transmitter Radio Adapter for iPod iPad iPhone Samsung Audio Devices with 3.5mm Audio Jack New version. Plug and play. Easy to know charging status with charging indicator. Longer Working Time. Upgraded rechargeable battery allows 3.5 hours playing time easily, which last 1.5 hours longer than common version. Recharging only takes 1 hour. Auto-off & Energy-saving. it will shut off automatically if paused for a minute or longer. Improved Performance. Enhanced FM signal and stronger anti-interference capabilities provide you high stereo sound quality. Portable and Light. Easy to carry, release your hands and pocket.