Walker's, Razor X 3.0, Hearing Protection, Neck Worn, Digital, Black/Orange, 4 Selectable Frequency Modes, 31dB NRR SPECIAL PURCHASE Retractable digital ear buds Dual Rechargeable Li-Ion battery High-gain omnidirectional microphones for clear sound enhancement Ear buds in improved position for wide range audio quality Integrated micro USB port Four (4) frequency modes: Universal, Speech Clarity, Hi-Frequency, Power Boost NRR: 31dB Product Description The Razor X 3.0 is Walker's latest patent pending neck-worn Razor offering to provide active hearing protection in a convenient neck-worn design. These ear buds can detect and deafen any loud sounds and the four (4) frequency modes allow you to customize your hearing protection experience. The retractable ear buds, light weight design and flat, no-tangle, cables mean you'll never have to sacrifice safety for comfort on the job-site and Walker's FREE control app allows you to connect and have complete control of your Razor X 3.0 from your phone.