The combination of urban silhouette and gear and metal in heavy industry has a double-sided texture (gray frosted plate and woven cloth surface sound control to carve out urban silhouette, transparent frosted plate can vaguely see internal gear rotation, like mist attached cover); Metal keys control on/off, magnetic beads slide up and down to adjust the volume, Bluetooth is shared, and gears start to rotate when music starts.

The city silhouette of heavy industry is combined with gears and me-tals, and has a double-sided texture (the gray frosted plate and the woven cloth surface sound control carve out the city silhouette, and the transparent frosted plate can vaguely see the internal gear rotation, like a mist attached to the hood); The me-tal bu-tton controls on/off, the magnetic bead slides up and down to adjust the volume, Bluetooth sharing, and the gear starts to rotate when the music starts.