Large Capacity and Multi-Use - Huge Capacity great for adding refrigerator or freezer space when RVs, campsites, boats, tailgating, fishing, road trips and outdoor activities Bluetooth Function - Connected to your cell phone via Bluetooth. You can turn on / off power, preset and monitor the temperature by an app for iPhone / Android phone. Its top cover has the digital panel to display real-time temperature in fahrenheit, which synchronizes with cell phone app. Convenient Car Appliances - Cooler box don't need a big space, it can be stored almost anywhere in your vehicle. And the top-open design won't distract the drivers when put in or take out food and drinks. Fast Cooling - For the compressor cooling technology, this refrigerator could achieve fast cooling. You could also choose ECO mode for energy-saving or MAX mode for fast cooling Easy to Control - Very easy to use, just connect the power source, simply choose the mode and adjust a target temperature. LCD screen shows the current temperature