Happy Tao via Amazon offers the Masione Wireless FM Radio Transmitter Car Kit for $12.99. Coupon code "YIAVNMWX" cuts it to $6.99. (Eshop-Best via eBay charges the same.) Plus, Prime members bag free shipping. That's tied with our May mention as the lowest price we've seen. (It's the best deal now by $6, excluding other Amazon vendors.) It transmits music from your smartphone or audio device to an FM radio via 3.5mm jack. Features include a USB charging port and hands-free calling.