Walkers Razor Tacti-Grip Series Electronic Ear Muffs 23 dB NRR MultiCam Grey. Full dynamic range HD speakers offer clear balanced sound. Specifications for Walkers Razor Tacti-Grip Series Electronic Ear Muffs: Manufacturer: Walkers Fabric/Material: Polymer NRR: 23 dB Quantity: 1 Size: One Size Battery Type: AAA Battery Quantity: 2 Included Accessories: None Age Group: Adults Finish: Rubberized Features of Walkers Razor Tacti-Grip Series Electronic Ear Muffs: Walker's Razor -"tacti-grip" High Performance Silicone Composite Headband Ensures A Slip Free Secure Fit; Omnidirectional Microphones; Low Noise/frequency Tuned For Natural Sound Clarify; Full Dynamic Range Hd Speakers For Clear Balanced Sound; Sound Activated Compression; Sound Dampening Composite Housing; 3.5mm Audio Jack; Rubberized Package Contents: Walkers Razor Tacti-Grip Series Electronic Ear Muffs None Walkers GWP-RSEMRH-MCCG: Razor Tacti-Grip Series Electronic Ear Muffs 23 dB NRR MultiCam Grey