Model: WT-3181 www.lacrossetechnology.com/support Page | 1. Model: WT-3181. Instruction Manual. DC: 062915. 18” Indoor/Outdoor Atomic Wall Clock.The radio controlled mechanism in your clock tunes itself to the time signal broadcast by U.S. Atomic Clock in Fort Collins, Colorado, also known as WWVB. Atomic Wall Clock user manual details for FCC ID P5FSPC1038 made by Digital Gallery Global Limited. Document Includes User Manual SPC1038 IM. SPC1038 Atomic Wall Clock. Controls. Thank you for your of your clock. Please read these instructions and store them in a safe Press the CHANNEL button at the back of the clock to set channel 1. • Lock the Quick Start Guide. ENTER/ Please read these instructions and store them in a safe place for future reference. • Enable the Daylight Savings Time Auto Adjust feature by moving the DST radio signal daily broadcast ensures that the atomic clock will always display the.