Optimized long excursion driver, individual tweeter, and dual JBL bass radiators produce crisp and high-quality audio both indoors and outdoors 30W subwoofer lets you enjoy full-throttle bass to enhance your listening experience Bluetooth 5.1 connectivity allows you to pair the speaker with up to 2 smartphones, tablets, and other compatible devices 27Wh Lithium-ion polymer battery offers up to 20 hours of playtime, so you can keep the party going for hours Built-in powerbank lets you recharge your devices while you are travelling or the music is playing Two USB input ports at the back let you connect compatible audio sources, power up the speaker, and charge your phones or tablets IP67 rating makes this speaker impervious to dust and water up to a depth of 1m PartyBoost feature lets you pair with multiple PartyBoost speakers to boost your party spirits with stereo sound