About this item 
     
                                         
Water Resistant
                                 
  
                                         
3-Hand Analog
                                 
  
                                         
Accuracy: ±20 seconds per month
                                 
  
                                         
Battery SR621SW, Approx. battery life: 2 years
                                 
  
                                         
Module 705, Size of case / total weight: 30.0 x 24.0 x 7.7mm / 10g