MobileCityOnline via Amazon offers the RevJams Studio Vibe Bluetooth Over-Ear Headphones in Black, model no. REV-X501, for $39.99. Coupon code "JHXTG4LA" drops it to $29.99. With free shipping, that's $3 below our June mention, $120 off, and the lowest total price we've seen. These noise-isolating headphones feature 20Hz to 20KHz frequency response, Bluetooth 3.0 with a 33-foot range, 20-hour rechargeable lithium battery, noise-canceling microphone, and carry case. Deal ends February 2.