Walker’s, Firemax, Bluetooth Electronic Earmuff, Black, Includes USB-C Charging Cable GWP-DFM-BT. Plus, these IPX4 waterproof-rated muffs also feature an advanced digital audio circuit and full dynamic range HD speakers for clear, balanced sound via four frequency modes-Universal, Clear Voice, High Frequency Boost and Power Boost-whether you’re on the job or enjoying some time at the range. The rubber Tacti-Grip headband with cooling gel earpads keeps long outings in warm conditions more tolerable, while the digital, soft-touch buttons ensure operation is both silent and intuitive. Powered by a 2,000 mAh lithium-ion battery that’s 100% rechargeable thanks to the integrated USB-C charging port and an included charging cable, count on these muffs to deliver up to 200 hours of use while you’re on the go. Auto shutoff ups the convenience factor, giving you one less thing to worry about. And, for added convenience, wearers can easily connect any of their mobile or smart devices using the 3.5mm audio jack. Bluetooth 5.0 Connectivity / Walker’s Link app compatible. Rechargeable -2000 mAh (200 hours battery life). Ultra Fast SAC – Sound Activated Compression. Digital soft touch silent button operation. 4 Frequency modes: Universal, Clear Voice, High Frequency Boost, Power Boost. USB-C charging port w/USB-C Charging cable included. Full dynamic range HD Speakers for clear balanced sound. Sound dampening rubberized composite housing. 3.5mm audio jack.