Walkers Rope Hearing Enhancer 29 db NRR Olive. Hi-gain omnidirectional microphones provide clear sound enhancement and a noise reduction rating of 29 DB. Rechargeable battery with 10-hour battery life. Specifications for Walkers Rope Hearing Enhancer: Manufacturer: Walkers NRR: 29 dB Color: Olive Battery Type: Li-ion battery Additional Features: HD speakers in the earbuds Battery Quantity: 1 Features of Walkers Rope Hearing Enhancer: Sound Activated Compression; High / Low Compression Mode; Powered By Rechargeable Li-ion Battery; Continuous Working Hours: 15 Hours; High Gain Omni Directional Microphones For Clear Sound Enhancement; Hd Speakers In The Earbuds For Wide Range Audio Quality Package Contents: Walkers Rope Hearing Enhancer (x3) Pairs of Foam Tips (S / M / L) Rechargeable Lithium Battery 12 Inch USB Charging Cable EVA Storage Case Walkers GWP-RPHE: Rope Hearing Enhancer 29 db NRR Olive