Product Dimensions                                    ‏                                        :                                    ‎                                 1.18 x 3.94 x 8.94 inches; 0.71 Ounces 
          
 Item model number                                    ‏                                        :                                    ‎                                 FB414BKPK 
          
 Batteries                                    ‏                                        :                                    ‎                                 1 Lithium Polymer batteries required. (included) 
          
 Date First Available                                    ‏                                        :                                    ‎                                 January 30, 2019 
                                  
 Manufacturer                                    ‏                                        :                                    ‎                                 Fitbit Inc 
          
 ASIN                                    ‏                                        :                                    ‎                                 B07M7PBCS2 
        
                                 
          
From the manufacturer