If you have a different model, please refer to the manual by clicking here: If you have the digital 4-button (SET, +, ALM, SNZ) model clock, you may use the following instructions to set your clock. HELPFUL INFORMATION ABOUT YOUR SKYSCAN DIGITAL ATOMIC CLOCK Skyscan Atomic Clock Instructions Model 38229-1.By reading this operating manual, the user will however receive a better understanding of the Skyscan Atomic Clock together with the optimum benefit of all its features. Operation of this product is simple and straightforward. 38229 not listed but other units may be similar. Lists manuals for Skyscan (SIOSCAN is the temp transmitter).