Here you will find specific information for each of our models/ sdu. In addition, please know that all of our products carry a 1 year manufacturer's defect warranty. If a return needs to be made for any other reason than warranty, it must be done within 30 days of purchase accompanied by a Return Authorization Number. No returns accepted without RMA. Please call to obtain one. In addition, returns carry a 35 % restocking fee. If any damage has occurred or parts are missing, an appropriate charge will be applied.