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29 dB noise reduction: more and more people suffer from hearing problems every day. For this reason, you need Gardtech hearing protection that meets European standards and meets the noise reduction efficiency of NRR 29 dB. 4-in-1 function: Bluetooth, MP3, FM radio and ear protection. Built-in digital Bluetooth and standard stereo cable for phone, MP3 player and hands-free calling. With the LCD display, you can easily display the status of Bluetooth, FM frequency and music. It is not only a hearing protection muff, but also can bring much more fun when working. Comfortable to wear: Thick foam padding, lightweight design and adjustable headphone length ensure comfortable and long-term use. USB charging: the package contains a rechargeable 800 mAh lithium battery and a USB cable. A full charge can guarantee a service life of 30 hours. Applicable occasion: The noise reduction headphones are ideal for gardening, woodworking, construction, racing, lawn mowing and other noisy environments.