Splash Proof Indoor Outdoor Wireless Bluetooth Speaker with SubWoofer for Enhanced Bass by SoundLogic XT Bluetooth version 2.1 + EDR Speaker output: 2 x 2 Watts + 1 x 5 Watts (Subwoofer) Play time: Up to 1.5 hours (max volume) or 4 hours (moderate volume) Bluetooth Range: 27-33 feet Built-in Rechargeable Battery: 3.7 V/100MA