Bluedio via Newegg offers the Bluedio Turbine T2S Wireless Bluetooth On-Ear Headphones in several colors (Blue pictured) for $19.99 with free shipping. That's the lowest price we could find by around $15, although we saw them for $2 less in June. They feature 57mm drivers, 20Hz to 20kHz frequency response, 16-ohm impedance, detachable 3.5mm cable, Bluetooth 4.1, and range of up to 32 feet. Deal ends September 9.