1.This product can be used for Walker's Razor Noise cancelling headphones. 2.Products include, Walker's Razor Noise cancelling headphonesAccessory, 3.5mm kenwood plug PTT. 3.Can be installed on the headset to add call function to Walker's Razor 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. Walker's Razor Noise cancelling headphones upgrade accessories