?Warranty? Earbay headsets guarantee 12-MONTH Warranty and 24/7 online service and more information through the user manual. ?All Day Comfort & Hands free?This Bluetooth Headphones with Microphone with adjustable headband for different head size. Horizontal and vertical swivel earcups, 270°Boom mic for your comfort work. Suitable for Home, office, Business, Classrooms, Skype, Zoom, Ms Teams, Webex, Whatsapp, Voip, Webinars, Conference. ?Switching 2 Devices & Stable Connection?This wireless Bluetooth headset with microphone supports connecting two devices at the same time. You can easily switch back to phone when there’s a phone call during a PC meeting. BT-88 new series wireless headsets with newly designed Bluetooth Soc, provide more stable and low latency connection. Connectivity range up to 50feet/15m. ?45Hrs Play time & 2 ways charge?Earbay headphones with mic is equipped with 500mah battery, ensure your all day work, 45 hrs playtime and 200 hrs standby time. Single charge 30 mins for 8 hrs play. This usb wireless headset can be charge with USB-C cable and charging station with magnetic charge port. ?Plug & Play Dongle/Wide Compatible?The Earbay BT-88 USB dongle is paired with the headsets with microphone in advance, you can simply plug the adapter into a computer and turn on the headset for instant using. Compatible with PC/laptop/tablets/cell phones and other Bluetooth devices (Non-Bluetooth devices connect with Dongle). ?Upgraded Mic Noise cancellation & Mute?BT-88 Bluetooth headphones with mic equipped with upgraded AI microphone noise cancellation, blocks out unwanted background noises. People on the other end will hear your clear voice. Microphone Mute function (Easily click once) can be used on PC/mobile devices, with indicator light and voice prompt.