Take your music on the road with the Smart Tune FM Transmitter from iSound. The high fidelity sound transfer and stable transmission in different environments ensure an enjoyable music experience while traveling. This device transmits audio wirelessly up to 30 feet. The Smart Tune features a built-in rechargeable battery and comes complete with a car charger to recharge your transmitter on the go. Even use it for hands-free phone calls through your sound system for enhanced safety while driving. The Smart Tune is compatible with most smartphones, MP3 players and tablets that feature a 3.5mm audio port. LCD displays frequency with backlight. Includes touch key design and high fidelity stereo with full frequency range and memory for last frequency.