MX-613 Wireless Bluetooth Headphones with Built-in Microphone for Calls. Bass-free headphones with clear stereo sound. headphones wireless with the latest Bluetooth 5.3 version. headphones bluetooth with up to 18-24 hours of playback time. Foldable, height-adjustable wireless headset. headset wireless compatible with all phones. over ear headphones with comfortable, soft cushions. Moogmax headphones in black.