1.This product can be used for Howard Leight Impact Sports Noise cancelling headphones. 2.Products include, Howard Tactical/Hunting Walkie Talkie Accessory, 3.5mm plug PTT. 3.Can be installed on the headset to add call function to howard noise canceling headset. Simply transform your headphones from noise canceling headphones to tactical headphones! 4.Suitable for shooting range, airsoft, hunting, and other communication scenarios. 5.No need to charge, plug and play. Howard Leight Impact Sports Noise cancelling headphones upgrade accessories