LightInTheBox offers the
Xiaomi Roidmi 3S 2-Port Car Charger for
$12.49 with
free shipping. That's the lowest price we could find by $3. It features Bluetooth 4.0 and two charging outlets.
Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.