Cruz Electric Bicycles was est. 2009 and work exclusively on electric bicycles and scooters. We carry one of the best selections of electric bicycles and conversion kits. All our products except S.L.A. batteries come with a one-year warranty. S.L.A. batteries have a 6 months warranty. The warranty is honored locally, Tucson AZ. We provide a contact number and have free technical support. Please feel free to call at (520) 573-7576, thank you.