Bluedio via eBay offers its Bluedio T4S Noise Cancelling Wireless Bluetooth Over-Ear Headphones in Red for $19.99 with free shipping. That's the lowest price we could find by $20.

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Features:
- 57mm drivers
- 15Hz to 25kHz frequency response
- Bluetooth 4.2 with 33-foot range
- 16-hour run time