The Sony SRS-ULT30/H ULT Field 3 Bluetooth Speaker in Forest Gray is a portable speaker that includes a rechargeable battery for convenient use anywhere. With a mono audio output mode and Bluetooth connectivity, this speaker is perfect for streaming music wirelessly from your devices. Its sleek design and water-resistant material make it ideal for both indoor and outdoor use. The package includes the speaker, charger, and assembly instructions, making it easy to set up and enjoy high-quality sound on the go.