CE certificate 20" 24" 26" 700c" and 28" mini motor wheel (24/36V 250W DC)Motor controller with LCD ((Display speed, voltage, mileage...)Speed throttle (Twist or thumb)PAS function (Pedel assistant)Power break leverSwitchOther options: LED front & rear light, disc brake, 6-speed cassette, controller box, li-ion battery & charger, rack and so on. mini motor electric bike conversion kits