4GB of RAM is the maximum running memory of the Android TV Box, ensuring higher performance and a more stable operating system without buffering or freezing. You can expand your 2.5/3.5-inch USB hard drive to 2TB of storage to give you more space for your entertainment. Dual-band WiFi 2.4G/5.8GHz and BT4.1. Receive a faster, higher-quality WiFi signal to ensure you enjoy higher-quality web browsing, gaming, running apps, and watching movies. The built-in BT4.1 allows you to connect a mini keyboard or other Bluetooth device. SUPPORTS 3D4KH.265 AND USB3.0. Support for 4K HD resolution and high dynamic range (HDR) for unprecedented clarity and smoothness. This Android TV box also supports 3D, so you don't need to go to the cinema to watch 3D movies at home, transfer faster through USB3.0, and enjoy transferring files easily