http://www.petrigoebike.com/el....ectric-bike/electric Designed to fold into a compact form, facilitating transportation and storage. When folded, the bike can easily be carried into buildings or on public transportation. You can easily fold it by flipping the switch Electric SystemMain Components Motor36V350W Bafang rear driving motorFrameAluminum alloy, 3 years warranty 1.5 years warrantyTyres20"*4.0", Kenda RimAluminum alloy Battery36V12.8Ah Samsung/LG Lithi