As one of its daily deals, Amazon offers the MEElectronics Air-Fi Rumble Bluetooth On-Ear Headphones with Mic in Black/Red, model no. HP-AF80-BK-MEE, or Blue/White, model no. HP-AF80-BL-MEE, for $39.99 with free shipping. That's tied with our July mention as the lowest total price we could find by $20. These closed-back headphones can be used wired or wirelessly and feature a 20Hz to 20KHz frequency response, 40mm drivers, 14 hours of battery life, and remote. Deal ends today.