WonderSwan console made by Bandai, with volume and contrast adjustment functions. I put in batteries, but it did not turn on. This is a junk item. - Model Name: WonderSwan - Brand: Bandai - Button Layout: X button, Y button, A button, B button, Start button - Speaker: Built-in speaker - Volume Adjustment: Volume adjustment function - Contrast Adjustment: Contrast adjustment function - Package Contents: Console, Instruction manual Thank you for viewing.