Measurement: 18.90" x 24.80" x 24.80"This speaker truly offers you a high quality sound performance and thrilling auditory experience. When you are going to throw a party for your friends or deliver a speech in front of a great number of people or provide a series of performance at a memorable night this item will be your reliable partner and it will definitely not fail your expectation. Being compatible with USB and SD memory cards and equipping with wireless Bluetooth technology you can play your desired music at any place and at any time. You can also be assured for its great safety guarantee. The built-in amplifier comes with internal protection and an outside heat sink cooling system can efficiently alleviate the high temperature. Do not hesitate to buy it now! It will never let you down! --Extraordinary versatility --Wide compatibility --Safety guarantee --Smooth rolling --Thrilling auditory experience