About this item [Hi-Fi Stereo Sound] Dual 40mm Driver Units and Bluetooth 5.0 Provide Lower Latency, More Stable Transmission Speed and Better Audio Output. [Foldable and Comfortable] The Earmuff Simulate Human Skin Texture for Lasting Comfort. Adjustable slider and Foldable Allows You to find The Superior Comfort. [Microphone and Control] Build-In Microphone which Let You Enjoy Completely Hands Free Listening Experience in High Definition Calls and Music, Control your Music to Start/Stop or Phone Calls to Answer/End Easily. [Long Battery Life] High Capacity Rechargeable Battery Provides to 25 Hours Playtime at 50% Volume or 14 Hours Playtime at 100% Volume, 2 Hours Fast Charging, Audio Cable Provided for Never Power off Listening. [Notice and Service] It Only Can Be Charged by 5V 1A/5V 2A Charger, It needs a Bluetooth Transmitter for TV without Built-in Bluetooth; Choosing Rockpapa, You Will Get 12 Months Warranty and 100% Customer Satisfaction in Addition to 24/7 Customer Support Service.