The Rope Hearing Enhancer features a sound activated compression, high gain omni directional microphones for clear sound and HD speakers in the earbuds for wide range of audio quality. It runs on rechargeable Li-Ion battery for up to 15 hours. Included are three foam tips (s,m,l), USB charging cable and EVA storage case.Specifications and Features:Color: Black/TanNRR: 29 dBStyle: In The EarBattery Size: Li-ion