The Pro Mag Gold is for serious shooters who want the best in comfort, reliability and performance. The Pro Mag Gold has an incredibly high NRR of 30. The exclusive DLSC Technology has the fastest response time in the industry at 1.5 milliseconds. Military grade dual circuit boards ensure a rugged and reliable pair of ear muffs, no wires to break or get snagged, and maximum adjustability, backed up by a 5 year warranty. This model is ideal for professional or very frequent and serious shooters and range officers.