This waterproof compact speaker with an ultra-portable design delivers surprisingly big audio and with rich bass.Wireless connectivity: Bluetooth® capability.Sizing information: 3.4" x 2.7" x 1.6"Additional features: With an innovative, recycled-knit speaker grill and ultra-compact design, this speaker has an integrated loop making it easy to bring on the go for up to five hours of playtime on a single charge. Requires lithium ion battery (included) Plastic/rubber/recycled-textile/metal Imported Forest Stewardship Council® (FSC) certified, ensuring forest management that preserves biological diversity and benefits the lives of local people and workers