The signals sent by GPS satellites are based on a total grid, which in turn is divided into five partial grids. With Satellite Wave, you can choose whether you want to receive “Position data and time signal” or “Time signal only”. * To to receive both position data and a time signal, you need all data from the overall grid. This requires at least 30 seconds. In order to receive only the time signal, at least one partial grid is theoretically generated in a time period of 6 seconds. required. Because our Satellite Wave technology is able to calculate the correct time based on only the first 1.2 seconds of a 1.2 second satellite wave. Partial grids, it only takes three seconds (including the time needed to find the GPS satellites), to get the correct time. CITIZEN is the only company in the world to offer this fast synchronization time of has reached three seconds. *Some models only receive time signals.