USA GEAR Universal Comfort Head Strap Action Camera Mount with Stretch-Fit Band - Compatible with Sony 4K FDR-X1000VR, FDR-X3000, HDR-AS300, HDR-AS100V, HDR-AS50, HDR-AZ1 and More UNIVERSALLY COMPATIBLE MOUNT works with action cameras such as the Sony 4K Action Camera FDR-X1000V , HDR-AS100V , HDR-AS20 , HDR-AS50 , HDR-AZ1 (Mini) , HDR-AS30V and Many More! ALL INCLUSIVE KIT comes with a J hook action mount adapter and a  tripod screw adapter CUSTOM SHOOTING ANGLES allows for multiple perspectives while snowboarding , cycling , climbing , skating and more MADE TO FIT with stretch-fit elastic and has a 2-point adjustable system featuring no-slip-grip lining to ensure a comfortable and secure fit BUY WITH CONFIDENCE with the included 3 year manufacturer's warranty. Circumference: 15-19 inches / Weight 3.52 ounces.