... arms. Two Way Radio Helmet Headset form Power-TimeModel No: PTE-119DSuitable for : all helmetWarranty: 12 monthsCertification:ROSH,CEFeature as below ... Helmet,unique design wearing in shoulders and arms,make the PTE-119D can setup in the existing and almost all helmet ... let me know ! Two Way Radio Helmet Headset,Fireman Headset PTE-119D Suitable for working in half-open or closed helmet ...