Bluedio via Amazon offers its Bluedio T4 Turbine Series Noise-Cancelling Wireless Bluetooth Over-Ear Headphones in several colors (Black pictured) for $45.99. Coupon code "Z83HCZRT" cuts that to $33.11. With free shipping, that's tied with our mention from three weeks ago and the lowest price we could find now by $9. These fold-flat headphones feature a 15Hz to 25kHz frequency response, 57mm drivers, active noise cancelling technology, Bluetooth 4.2, microphone, on-board controls, swiveling ear cups, USB-C audio/charging port, detachable 3.5mm cable, and rechargeable battery with up to 16 hours of playback per charge. Deal ends January 31, 2018.