HazmatCE takes all of the important aspects of the Emergency Response Guidebook 2004 and places them in the palm of your hand. Unlike other handheld ERGs, this is not a watered down version. It includes many other options that the ERG2004 does not have. Once installed you will have a 10-day grace period to try the program. If you are unhappy with the program, return it for a full refund. After 10 days you will need to register your program. You will need to contact support@techonsoftware.com to receive your registration code. The program is registered and licensed to the owner and handheld where it is installed. The license is non-transferable. There is no refund after the registration code is issued.