BT21 MY Littele Buddy Baby Version "BRAND NEW & 100% authentic" Made by Royche Ship From Korea Bluetooth wireless, 2.4Ghz wireless combination made by Royche When connected to Bluetooth Connect 3 devices at the same time Ipad laptop with bluetooth function, macbook bluetooth connection When connecting 2.4Ghz wirelessly Connect the USB receiver on the back of the product to the USB port of a computer notebook to access a mouse Simultaneous connection to computers, tablets, laptops and smartphones BT1 on the back of the mouse. One button to switch between BT2 and 2.4G modes By connecting 3 devices at the same time, you can easily switch to the device you want. 1200DPI matte optical sensor It provides fast response speed and precise control. Product size 5.8x10.7x2.7cm Package mouse, AA Battery, Manual, Usb nano Reciver