1.6061 alloy frame, foldable 2.lithium polymer 36V/10Ah 3.250w brushless 4.factory ... .CE,EN15194,RoHS, MSDS, UN38.3 21 speed 36v 250w foldable 26" e-bke kit Hot Sale500pcs in StockModel: Z3SpecificationsFoldable designOverall ... long service life CETIFICATIONSCE,EN15194 EN14764 21 speed 36v 250w foldable 26" e-bke kit