This is the "3D WHISTLE 2g Kyushu Nature Trail Limited Edition" from MIYAGEN Trail Engineering. This rare model is mainly sold at event venues. The item I am offering is "new." I am selling it to organize my gear. Product Name: 3D WHISTLE 2g Weight: 2g Material: ASA/ABS Color: Green x White Size: Length 9mm, Width 51mm Volume: 120-135dB Age Recommendation: 15 years and older