【Features】 ● With 4 chambers, it produces a loud enough sound to cause tinnitus if blown with full force. ● Compared to the M size, the S size produces a higher pitch. ● The glow-in-the-dark material is used for everything, including the paracord. 【Specifications】 Size: Approximately 14mm (width) x 14mm (length) x 52mm (height) Weight: Approximately 7g Material: Resin, 1.18mm paracord 【Notes】 ・ Please note that accessories other than the item in the listing title are not included. ・ Due to 3D printing, there may be imperfections such as layer lines, burrs/traces of support material removal, and rough surfaces, which can be described as handmade-like. ・ Individual sales are not possible. ・ Price negotiations are not accepted. ・ We will ship in a compact and simple package. Whistle, Bear Deterrent, Glow, UL, Ultralight