Check the listing for details. Walker's GWPRSEM Razor Slim Electronic Muff - Black. Color: Black, Condition: New. Listed at 55.28 USD. Razor Series Muffs Feature Two Omni Directional Microphones, Full Dynamic Range Hd Speakers For Clear Balanced Sound Output, Independent Volume Controls, Audio Input Jack And A Sound Dampening Composite Housing With Ultra-Low Profile Rubberized Cups And Comfortable Headband. Low Noise Frequency Tuned For Natural Sound Clarity. Sound Activated Compression Provides .02 Second Reaction Time. Operates On 2 Aa Batteries. Two Omni Directional Microphones Full Dynamic Range Hd Speakers For Clear Balanced Sound Low Noise / Frequency Tuned For Natural Sound Clarity Independent Volume Controls Sound Dampening Composite Housing Sound Activated Compression 0.02 Second Reaction Time Audio Input Jack Recessed Volume Control Knobs Comfortable Headband With Metal Wire Frame External Battery Door Operates On 2 Aaa Batteries Included