This Etekcity Wireless Bluetooth 4.0 Receiver Audio Adapter originally $49.99 drops to $20.99 and then again to $19.94 (with extra 5% off coupon) at Amazon.com. You save 60% off the retail price for this internet radio audio adapter. Add extra for shipping or receive free shipping over $25. This is the lowest price we could find online by about $5. The Etekcity Wireless Bluetooth 4.0 Receiver Audio Adapter enables any powered speakers or A/V receivers to use bluetooth capabilities. Sales tax is charged in most states. Deal expires soon.