The product is a set of 3 dark green safety whistles made of lightweight and durable plastic. Each whistle has a 120 dB decibel output and measures 50mm in length and 10mm in width. Ideal for outdoor activities like hiking, these whistles are nontoxic and designed for survival, sports, hiking, and other outdoor adventures. With a loud noise output, these keychain whistles are a practical and reliable tool for staying safe and alert while in nature.