With the latest Bluetooth networking technology, it can support up to 100 speaker wirelessly connections. Your mobile phone or Echo dot can be synchronized with multiple speakers, so that you can immediately have a great sound system at home. These speakers can be paired in groups, and each one can work as an individual Bluetooth speaker also. This speaker is compatible with any Inwa Outdoor speakers with the Bluetooth name "Sync Speaker". This outdoor speaker system is powered by a corded adapter which provides stable and strong power output. Newly upgraded high-quality tweeter and woofer produce impressive bass response while delivering big volume.