? HD HIGH FIDELITY SOUND - The wireless beanie hat features latest technology and state of the art acoustic components that produce incredible sound quality with deep bass and crystal clear treble. A combination of CVC 6.0 noise isolation technology and premium quality acoustic tuning allows you to focus on favorite music and answer calls without skipping or missing one word. ? WIRELESS TECHNOLOGY - The Latest wireless chipset strongly enhances audio and communications. The Wireless hat connects stably with cell phones, tablets, laptop and other wireless enabled devices up to 30 feet (10 meters) away. ? EXTENDED BATTERY LIFE - The built-in rechargeable Li-Ion battery is able to continuously play music up to 5-8 hours (depending on the volume and the distance from the source device) and 60 hours stand-by time with a quick charge of only 1 hour (Micro USB charging cable included). ? HUMAN ENGINEERING DESIGN -?The simple 3-button Panel built-in stereo speaker and microphone, makes this musical knit cap easy to answer calls, play music, adjust volume without touching the phone. Siri Voice Assistant can also be activated on iOS device to give commands. ? RELIABLE SERVICE PROVIDED ? Free Lifetime Technical Support, 12-months Worry-free and Amazon 30-days Money Back Plan Provided. If you have any problem, please email us, we will provide satisfied solution to you.