Ion Audio iPA76C Block Rocker Wireless Rechargeable Speaker System (Up to 75 Hours Battery) 50 watts of dynamic power for parties, cookouts and more: Built-in rechargeable battery provides up to 75 hours of use Wirelessly connects to an additional Block Rocker (iPA76C) via True Wireless Stereo (TWS) Control your Bluetooth music with Play/Pause, Next Track and Previous Track buttons 6 dedicated preset buttons with 12 total preset spots [6 FM and 6 AM presets] Rugged Rubber corners; Large easy to read display