Rocksteady Stadium is your portable powerhouse sound system. Each wireless Bluetooth speaker features a multi-driver setup with a tweeter, mid-bass driver, and bass drums with custom sound tuning that create rich, vibrant sound in a portable speaker to listen anywhere. Connect unlimited speakers or subwoofers with the one touch, covering large & small areas, indoors & out. Once STADIUM Speaker or subwoofer is connected to source device, link more satellite Speakers or Subwoofers with one button. Each linked Bluetooth speaker can be set to either audio track and EQ setting to customize your sound across your space. Infinitely expandable, you can connect unlimited Rocksteady STADIUM Speakers & Subwoofers with one touch, covering any size area, for multiroom speakers at home, office, indoors or outside, transforming your space into a fully immersive and expansive listening area. Long-lasting battery with up to 30 hours of playtime to keep the party going, and up to 100 Feet Bluetooth range. Intuitive touch controls with 1-Tap pairing, connecting, and linking speakers. Connect your favorite media with Bluetooth or 3.5mm auxiliary jack. Includes 4 Rocksteady Stadium speakers, 3 USB-C charging cords with USB wall plugs, 3.5mm auxiliary cable, and instruction manual.