Cowin via Amazon offers its Cowin E-7 Active Noise Cancelling Wireless Bluetooth Over-Ear Stereo Headphones in Black for $69.99. Coupon code "8F3IW8QB" cuts that to $39.99. With free shipping, that's only a buck more than our mention from two weeks ago, which was the lowest price we've seen. (It's the best deal today by $42.) They feature a 20Hz to 20kHz frequency response, 40mm drivers, microphone, on-board remote, 3.5mm auxiliary port, 90° swiveling earcups, and rechargeable battery with up to 30 hours of playtime per charge (in Bluetooth mode).