Storable slot under the button cover for Nano receiver, very convenient for traveling. Low battery indicator - When the voltage of the battery is low, the led under the scroll wheel will starts to blink until the battery is replaced) Built-in automatic shut off timer Functioning headlights and rear lights with on/off switch - There is a switch button underneath the bottom cover, if you push the button to the middle, then you can use your mouse but the led is switched off. but if you push the button to the left, then the mouse and led are both on. It fits comfortably in the hand and has three buttons and a new type of scroll wheel providing better grip. This model comes with three colors with incredibly detailed finishing. It is the perfect gift for all car enthusiasts and collectors of sports cars merchandise! A beautiful scale model and a very advanced car mouse which is officially licensed.