Amazon offers Prime members the Jarv Nmotion Sport Bluetooth Earbuds in Black for $19.99 with free shipping. (Non-members can qualify for free shipping with orders of $35 or more; otherwise, shipping adds $6.17.) That's $5 below our mention from this past fall and the lowest total price we've seen. (It's a current low by $5.) They feature in-line mic and function buttons, Bluetooth 4.0, and a lithium-ion battery.