This innovative 18oz Double Wall Powder Coated Bottle features a built-in Bluetooth speaker made of durable silicone, PP, and an iron net for quality sound. Powered by a 300mAh Lithium Polymer battery, the speaker offers up to 1 hour of playtime at maximum volume and recharges fully in just 1 hour via a Type-C cable. With a Bluetooth range of 33 feet, enjoy your favorite tunes while staying hydrated on the go.