CSHope via Amazon offers its CSHope Bluetooth Car Adapter with FM Transmitter for $13.99. Coupon code "ALXVAGP9" cuts that price to $11.19. Plus, Prime members bag free shipping. That's $10 under our Black Friday mention and the lowest price we could find by $13. It features a microphone, dual USB inputs, and a 3.5mm audio cable. Deal ends May 31.