Embracing sustainability with a design made from a single block of milled aluminum, Nocs Labs’ $1,289 Monolith x Aluminum is an 8.8 pound wireless speaker featuring Bluetooth, Wi-Fi, and support for Spotify and Tidal. Its five drivers include a pair of four-inch woofers all powered by a 15 hour rechargeable battery, and up to eight of the speakers can be paired for synced playback.