Size 8.5 x 2 inch Operated by AA 1.5 v x 2 Batteries ( Slid the top by pressing silver Top And Add Batteries ),structure - stainless steel stirrer and plastic hand shake Best for frothing or making sherbet ,yogurt ,lassi or cold coffee or protein shake at gym or espresso cappuccino It will beat your eggs faster and better than what you can with a spoon. Simple 1-hand operation with results in 20 to 30 seconds,It will froth your milk and coffee/cappuccino as if you are having it at a cafe! to open Blender Just Press Silver Top of Blender and Slide it to back side and insert 2 AA size batteries and close the same. HOW TO ENTER BETTERIES: Slid the top by pressing silver button on Top side And Add Batteries. One battery should have + sign on top side and another one should have + sign on bottom side. Both entered batteries should on opposite position