Sony SRS-XB33 Wireless Extra Bass Bluetooth Speaker, Party Lights, Party Connect, Waterproof, Dustproof, Rustproof, Speaker with Mic, Loud Audio for Phone Calls, Up to 24 hours of battery life means the SRS-XB33 can party even longer than you can. Even with the lighting on in EXTRA BASS mode, you can party for up to 14 hours.