Radians Vertex Electronic Ear Buds 21 dB In The Ear Tan/Black. Ambient sound can be amplified up to 5X while harmful noise can be compressed at your choice of two decibel levels. Soft rubber tips offer a comfortable fit and a reflective woven cable allows for hanging of the earpods around neck for security. A Lithium ion battery is incorporated for rechargeability. Specifications for Radians Vertex Corded Electronic 21dB In-Ear Hearing Protection: Manufacturer: Radians Color: Black/Gray Battery Type: Lithium-ion Rechargeable Features of Radians Vertex Corded Electronic 21dB In-Ear Hearing Protection 21dB NRR for in-ear hearing protection High/Low compression levels: 85dB & 105dB 5X enhancement of everyday sounds 35 hours of use per full charge Rechargeable lithium ion batteries (USB-C cable included) 9mm dynamic range speakers 2 omni-directional in-ear microphones 3 rubber ear tip sizes for best fit Woven cable lanyard Package Contents: Radians Vertex Corded Electronic 21dB In-Ear Hearing Protection Storage case Radians VXAC40 Vertex Electronic Ear Buds 85 DB In The Ear Black/Gray VX-AC40