Æ?Hi-Fi Stereo SoundÆ??- Designed with Bluetooth 4.1 technology with advanced CSR8645 chips, ensuring faster and stable signal connection and transmission. The CVC6.0 noise cancelling technology can filter out background noise, allow you enjoy high quality sound performance with super bass even you are in a noisy environment. Æ?Vibration Alert & Voice CommandÆ??- This headset allows users to connect to 8 Bluetooth devices, and 2 devices simultaneously. AI VOICE COMMAND features to activate Siri, Bixby and Android to call, text and navigate, etc. VIBRATION ALERT system notifies a user with vibration when incoming call is detected. Æ?Long-lasting BatteryÆ??- Powerful rechargeable battery provides up to 14 hours of continuous talking/music time and 180 hours of standby with a single charge, perfect choice for all day outdoor activities. Support live Battery capacity shown on iOS Devices. Æ?Neckband Design with Auto Retractable EarbudsÆ??- Ergonomic neckband design, you can wear the headphone on your neck comfortably and perfectly, decrease the pressure of your ear, maximize the portability of listening music on the go. Auto retractable earbuds allows you to pull the retractable wire to the length you want and retract when not use. Æ?Lightweight and DurableÆ??-Weighs only 1.5 oz and 40% lighter than most of other neckband wireless headphones.Made of high-class materials,no worry about the durability. Meanwhile,Gardway provides 12 months replacement warranty.