Happy Tao via Amazon offers the Lumsing Bluetooth Car Kit Receiver Adapter for $19.99. Coupon code "J5WVW3UY" drops it to $9.99. Plus, Prime members bag free shipping. That's $10 off and tied with last week's mention as the lowest price we've seen. It features Bluetooth 4.0, compatibility with speech recognition applications (Siri, Google Now, Samsung S-Voice, etc.), and a magnetic mount. Deal ends April 24.