OS ‎Android Product Dimensions ‎8 x 4 x 15 cm; 56 Grams Batteries ‎1 Lithium Polymer batteries required. Item model number ‎Kr Wireless communication technologies ‎Bluetooth Connectivity technologies ‎Bluetooth GPS ‎No GPS Special features ‎Activity Tracker Display technology ‎LCD Other display features ‎Wireless Human interface input ‎Buttons Scanner Resolution ‎240 x 240 Color ‎Black What in the Box ‎Smart Watch Item Weight ‎56 g