Bought in January, used twice inside. Currently $79 on Amazon Audio-Technica ATH-M20xBT Wireless Over-Ear Headphones,Black, Adjustable Brand Audio-Technica Color Black Ear Placement Over Ear Form Factor Over Ear Impedance 36 Ohm Noise Control Sound Isolation Wireless, on-the-go design delivers the same sonic signature as the wired ATH-M20x professional studio headphones 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils are tuned for enhanced low-frequency performance Low latency mode improves synchronicity between audio and video for smooth streaming and gaming Multipoint pairing function allows you to stay connected to two Bluetooth devices at once Up to 60 hours of continuous use on a full charge and up to 3 hours of use on a 10-minute rapid charge (via USB-C connection)