✓?24 Months Warranty?Maybe we can't be 100% satisfied with our electronic products, but we will try our best to be 100% satisfied. ✓?3.5mm Connectivity & Battery Power?Headphones are designed to work with a multipurpose 3.5mm audio cable (5+4ft) with mic mute and indicator/speaker mute. Compatible with tablet/Mac/iOS/Laptop/Android phone and other devices. The Bluetooth headset provides up to 14 hours of continuous talk and 200 hours of standby time on a single charge, plus 2 hours of work time with a 10-minute quick charge. Long battery life brings convenience to your life. ✓?Adjustable Headset?The padded headband of the wireless headset is adjustable and stretchable to fit your head perfectly, suitable for both children and adults. Soft protein memory foam ear cushions are made with premium breathable material, ROHS certified material prevents ear heat and sweat(The microphone return to home position can mute the function only applies to the call state). ✓?Bluetooth Headphones?On-ear headphones connect quickly to your phone or tablet via Bluetooth. Phone headset with built-in audio sound card,tested thousands of times for your daily conversation/music/movie/game by JIAMQISHI ,bringing you extra clarity and bass for a pleasant experience. ✓?Qualcomm cvc8.0 Noise Cancelling Microphone?JIAMQISHI EH02U wireless headset for computer Qualcomm chip QCC3024 equipped with AI environmental noise cancelation microphone, it can eliminate up to 99.99% of the ambient noise. So you can hear and be heard clearly wherever you are.