Firemax Behind the Neck Earmuffs. Made in the USA or Imported. FIREMAX MUFFS – Protect your ears while at the range or the racetrack with the FireMax Electronic Muffs; these earmuffs ensure maximum protection, without weighing you down or interfering with the butt of your gun. RECHARGEABLE BATTERY – The digital platform includes four frequency modes controlled by silent soft touch digital buttons and is powered by a 2000 mAH rechargeable lithium battery for over 200 hours of performance protection! 4 FREQUENCY MODES – The Universal and Power Boost modes enhance general sound to specific levels while the Clear Voice and Hi-Frequency modes can be chosen to better discern conversations and higher-frequency sounds (such as steel impact), respectively. ALL-DAY COMFORT – The muffs also come with a new Rubber Tacti-Grip headband and cooling gel ear pads to support all day comfort whether you’re wearing them in the field or on the range! DETAILS – Digital soft-touch buttons make for easy volume and activation control, and a 3.5mm audio jack readily accepts a variety of audio input devices, such as radio comms and MP3 players for enhanced convenience.