Stack Social offers the MEElectronics Air-Fi Matrix2 Bluetooth Headphones, model no. HP-AF62-CF-MEE, for $79.99 with free shipping. That's $10 under the lowest total price we could find elsewhere. Features include a built-in microphone, 22-hour battery life, and 20Hz to 20,000Hz frequency response. With Bluetooth 4.0, they are compatible with devices with a Bluetooth 2.1 or higher transmitter. Deal ends May 4.

Note: Bluetooth receivers such as sound bars or separate Bluetooth receivers may not be compatible.