Don&';t lose the fun and convenience of the e-bike experience. For your bike to detect your pedaling and start the motor assistance your speed sensor needs to be in working order. If yours becomes damaged don&';t allow the fun and convenience to be taken out of your cycling - select your bike model and order a new one. Keep your bike working the way you love. Description: NAKTO electric bike speed sensor for City Stroller Photo: SKU:W060065S Model:This NAKTO speed sensor suits for City Stroller Shipping:The product usually be dispatched at the same day that orders received, and it usually takes 3-7 days to be delivered. You can get free shipping, and we only ship to the US.