Harman Audio offers the factory-refurbished JBL Synchros On-Ear Bluetooth Headphones in four colors (Red pictured), model no. E40BT, for $34.99 with free shipping. That's $5 under last month's mention and the lowest we've seen for a refurb. (It's also $25 under the price of a new pair today.) Features include 40mm drivers, up to 16 hours of playback via Bluetooth per charge, a 3.5mm audio cable, and 20Hz to 22kHz frequency response. A 1-year JBL warranty applies. Deal ends January 22.