Desxz Bluetooth Headphones Over Ear, Hi-Fi Stereo Wireless Headset, Foldable, Soft Memory-Protein Earmuffs, w/Built-in Mic FM and Wired Mode for PC/Cell Phones/TV SOUND QUALITY :The 40mm Drivers Offering a Frequency Response of 20Hz to 20KHz and Exceptional Sound Reproduction and Wide Dynamic Range to Provide Outstanding Sound Quality. WIRED OR WIRELESS HEADPHONES : The built-in 400mAh Battery Provides up to 6 hr music Time and 10-hr Talking Ttime in a Single Charge . The Audio cable are as Bonus in The Package, You Can also use it as a Wired Headphones with the Provided Audio Cable to EAnjoy your music. Extendable, Fordable And Portable Ergonomic design and retractable headband lifts the burdens for your ear.Foldable design makes it convenient to carry and easy to store them when not in use or during travels. Help you save your space. The padded soft cushion allows you to enjoy your relaxing time for a long time. Warmly reminder that please take off the headphone every 1-2 hrs to get your ears relax to get earing comfort and protect your ears. HANDS-FREE CALLViotte Bluetooth headphones provide a quick and stable connection with your Bluetooth enabled devices like cell phones, tablets, pc, TVs within 33 feet, with a high-quality built-in microphone for hands-free calls.( The Microphone only works in the wireless mode.) WHATS INCLUDED: Adjustable earphones, retail gift box, audio, charging cables and manual