This mount is suitable for attaching your Pentax WG series digital camera to your chest. Perfect for any sports where you want your hands free such as skateboarding, roller blading, free running etc. Suitable for use with Pentax Optio W90, WG-1, WG-1 GPS, WG-2, WG-2 GPS, WG-3, WG-3 GPS, WG-4, WG-4 GPS, WG-10 and WG-20 camera models. (this mount is not compatible with WG-M1)