PROHEAR 037 is a safety Bluetooth earmuff for hearing protection and entertainment, it is the most Cool & Unique gift for your family and friends . With a high capacity lithium rechargeable battery, long battery life, comes pre-charged and ready to use. Bluetooth 6.0 wireless technology, allows you to move easily during work, helping you focus on and enjoy your workday. Wired + wireless, support aux audio jacks, suitable for extremely noisy environments such as wood cutting, snow blowers, leaf blowers, buildings, etc. Stereo sound enhances the sensory experience, and integrates a microphone to make hands-free calls. And UPGRADE BLUETOOTH 6.0 TECHNOLOGY allows you can let go of your hands, even at 80ft. Super soft telescopic height adjustment headband with replaceable foam ear pads, customized fit. THERE NO NEED TO WORRY. PROHEAR PROVIDE ONE YEAR WARRANTY. PROHEAR is committed to providing the best service for you. If you have any comments or suggestions on our products or services. Please feel free to contact us.