World Wide Stereo via Rakuten offers the Harman Kardon NC Noise-Canceling Over-Ear Headphones, model no. HARKARNC, for $139.95. Apply coupon code "MP30" and checkout with MasterPass to drop it to $109.95. With free shipping, that's $40 under our mention from a month ago and the lowest total price we've seen. (It's also a current low by $110.) These USB-rechargeable wired headphones feature active noise canceling, 40 hours of battery life per charge, user-exchangeable metal bows, self-adjusting housings, and a frequency response of 16Hz to 20kHz. Even when the battery is depleted, they work in passive playback mode. Deal ends December 16.