Garland Led Cotton Balls Light String - Set A. SPECIFICATIONS: Shape: Ball Voltage: 3V Power Source: Dry Battery Waterproof: No Item Type: Beads Diameter:6 Cm(about) The Difference Between Battery, USB, Plug and Remote Control** Battery: Put AA Batteries in the Battery Box, and the Light String Will Light Up. There Are Three Modes: Steady On, Flash, Off. USB: After Plugging in the USB Power Source, the Light Will Light Up Directly, There is No Battery Storage Power Function  EU Plug: You Can Switch the Light Mode by Pressing the Button of the Simple Controller(steady On, Slow Fade, in Waves, Etc.)It Can Be Plugged into a 220V Power Supply. Two Plug Light Strings Can Be Connected Back and Forth.  Remote Control: Its Light Sting is Powered by AA Batteries, It Can Adjust the Brightness, and Select Light Modes: Combination, in Waves, Sequential,slo Glo, Chasing, Slow Fade, Twinkle, Steady On, Off. INCLUDES:1 a Piece of Light String Without Batteries.. We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.