Motorola S11-Flex HD Wireless Stereo Bluetooth Headset for $34.99. Shipping is free on orders over $35. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. The S11-Flex HD Wireless Headphones are compatible with Bluetooth-enabled devices such as many Android and Apple smartphones, MP3 players, and more. It features a rapid-charge battery that lasts supposedly up to three hours with just 15 minutes of charging. Most places have it for about $62.