Casio CTS300With the CT S300 you can enjoy music whenever and wherever you like. Its compact size of 930 mm x 256 mm x 73 mm is 30% smaller in volume than the CTK 3500 model, and it boasts roughly 19 hours of alkaline battery life. With a grip at the top of the keyboard and a weight of only 3. 3 kg, it couldnt be easier to carry. The design incorporates rounded edges and corners, making it safely portable. The CT S300 features a simple, intuitive interface,