Comfortable & Discreet Design:Ergonomic ear hooks fit snugly for secure, stable wear while remaining nearly invisible. Volume control with intuitive swipe-up (increase) and swipe-down (decrease) adjustment. Smart Noise Reduction & High-Quality Sound:Covers a 500Hz~3200Hz frequency range, delivering natural, true-to-life sound. Long Battery Life:18 hours of continuous use on just 8.5 hours of charging via USB. LED charging indicator (red = charging, green = fully charged). Professional Performance Specs:Max SPL (OSPL90): 128dB .Max Gain (FOG50): 50dB for powerful amplification. Complete Accessories & Support:Includes 2 hearing aids, 8 ear domes, cleaning tools, a charging cable, and a storage case.Reliable after-sales service for a worry-free experience.