Monoprice offers its Monoprice Bluetooth 4.0 On-Ear Headphones with Built-In Microphone in five colors (Yellow pictured) for $34.99. Coupon code "AF5" drops them to $29.99. With free shipping, that's $45 off list and the lowest total price we could find. They feature a 20Hz to 20kHz frequency response, Bluetooth 4.0, 32-foot range, call answering, and a storage pouch. Deal ends July 5.