Whether on the range or in the woods, Walker's Isolator Digital Electronic Earbuds ensure you hear what matters and tune out what doesn't. Designed for shooters, hunters, and other outdoor enthusiasts, these premium earbuds combine an impressive 24 dB NRR (Noise Reduction Rating) to shield your hearing from gunshots and other loud noises. Plus, everything about the appearance and functionality of the buds is streamlined and intuitive, from the patented Sure-Lock fin and foam tip system to the ergonomically placed buttons that are both easy to access and sleek in their appearance. And at the end of a long day at the range, the duo's built-in lithium batteries, which provide up to 80 hours' worth of runtime, are easily recharged using the included micro-USB cable, so you always have appropriate hearing coverage juiced up and ready.