About this item Stereo sound headphones: KVIDIO upgraded bluetooth headphones with dual 40mm drivers and noise isolation technology, offers an almost concert hall-like feel to your favorite music as close as you're watching it live. Provide high-quality reproduction of sound for listeners, audiophiles, and home audio enthusiasts Unmatched comfortable headphones: Over ear earmuff made by softest memory-protein foam gives you all day comfort. Adjustable headband and flexible earmuffs can easily fit any head shape without putting pressure on the ear. Foldable and ONLY 0.44lbs Lightweight design makes it the best choice for Travel, Workout and Every day use by College Students Wide compatibility: Simply press multi-function button 2s and the over ear headphones with mic will be in ready to pair. KVIDIO wireless headsets are compatible with all devices that support Bluetooth or 3.5 mm plug cables. With the built-in microphone, you can easily make hands-free calls or facetime meetings while working at home Seamless wireless connection:: Updated Bluetooth version V5.3 ensures an ultra fast and virtually unbreakable connection up to 33 feet (10 meters). Rechargeable 500mAh battery can be quick charged within 2.5 hours. After 65 hours of playtime, you can switch KVIDIO Cordless Headset from wireless to wired mode and enjoy your music NON-STOP. No worry for power shortage problem during long trip Customer Support: Package include a Foldable Deep Bass Headphone, 3.5mm backup audio cable, USB charging cable and User Manual. Please feel free to contact us if you have any inquires during using *Comparing to other kinds of headphones, KVIDIO over-ear headphones adopted the most advanced audio decoding technology and leave more space between sound source and eardrums, perform better audio quality, blocking out ambient noise, and protect ear health perfectly. *Simply turn on KVIDIO wireless headphones and connect it to your Bluetooth device with one click, then, you can jump into music world without disturbing, no worry about tidying up all cables anymore. *Two Devices Connection: Support simultaneous connection to 2 Bluetooth devices, easily switch back and forth Optional Wireless and Wired Working Mode. Compatible with ALL Bluetooth or 3.5mm plug cable enabled devices including laptop, Android, iPhone, tablet, Kindle Fire Dual 40mm Powerful Drive and Deep Base technology: adopted for crystal clear sound quality presentation Built-in Stereo Microphone: suit for any online meeting, hands-free call Super soft, Memory-protein Earmuffs: for long term wearing comfort Flexible and Adjustable Headband: for any head shapes and sizes Built-in 500mAh Battery: Power saving technology, ensure 65 hours continual playing time Charging time: 2.5 Hours (blue light on indicate fully charged) Use a 5.0V==1.0A (or higher than 1.0A) charger to charge KVIDIO 201 Suitable for: Compatible with smartphone, MP3, MP4, laptops, iPad, iPod, iPhone, Android and many other Bluetooth-enabled devices. Note1: A wireless Transmitter (NOT Included) needs to be prepared when connected with a non-Wireless enabled PC. Note2: USB C Cable is used only for charging, not wired mode. Microphone only works with Bluetooth mode not wired mode. Note3: Couldn?t connect? If the earphone is connected, then it wouldn't be connected to the second device at the same time. Please hold the "-" button and middle button at the same time for 5 seconds to clear the devices connected. Next you can connect and switch between these 2 devices.