Sony SRSXB21/B Overview
The Sony SRS-XB21 Portable Wireless Bluetooth Speaker has been designed to be the life of the party. With Live Sound mode, Sony uses DSP technology to spread the music out to a wider audience for a festival-like audio experience. You can increase the coverage drastically by using Wireless Party Chain. It lets you hook up to 100 (optional) speakers together, all syncing to play the same audio. EXTRA BASS gives that audio an additional deep and powerful boost of bass to keep the party going.
Utilizing Bluetooth and NFC technologies, the SRS-XB21 can stream audio from a smartphone or tablet. During playback, you can manage the audio via the built-in controls, or through Sony's Music Center app for Android and iOS devices.
Stream that audio inside or out, thanks to its IP67 rated protection, which means the speaker is totally waterproof and dustproof. It's even constructed from materials that make it totally rustproof as well, so a little salt water won't ruin the party.