To register, find your Kooler Kar serial number, which is located on a silver label in three places on your Kooler Kar. 1). on the battery; 2. on the front fork; or 3. on the rear axle. Please supply your name, address, model you purchased (example 300 watt, 500 watt, 33cc gas power, 39cc gas power), and date of purchase. Send this information to register@cruzincooler.com.