Happy Tao via Amazon offers the Lumsing Bluetooth Car Kit Hands-Free Receiver Adapter for $19.99. Coupon code "SU887TUP" cuts the price to $9.99. Plus, Prime members receive free shipping. That's $11 under the lowest price we could find for a similar adapter kit. Features include a built-in mic, a call/play button, and GPS, music, and podcast streaming via compatible smart devices. Deal ends May 22.