Blue bicycle wheel with green brake calipers. Those familiar with Susumu Hirasawa will understand (*^^*) This is an electronic instrument that generates electricity while playing, by spinning the wheels. It's a miniature version. It outputs power via a USB port, so it can be used with any USB-connected instrument. You'll likely need to have the power generation part securely fixed by a bicycle shop. Due to account limitations, I cannot offer cash on delivery, so please consider the price to include shipping! Please bid only if you understand that this is a handmade item. m(_ _)m - Type: Bicycle wheel - Color: Blue - Accessories: Green brake calipers Thank you for looking.