The ASUS Zenfone 8 5G Dual ZS590KS is a flagship smartphone designed for high performance and immersive user experiences. It comes with a generous memory capacity of 256GB and an impressive 16GB RAM, ensuring smooth and efficient operation even when multitasking or running demanding apps and games. 

The device supports GSM networks only and is factory unlocked, which means it can be used with any GSM carrier worldwide. However, it is not compatible with CDMA networks. This particular model is the International Version, so it's suitable for use across different countries.

The ASUS Zenfone 8 5G is presented in an elegant black finish that adds a touch of sophistication to the overall design. The smartphone is compact yet powerful, boasting a 5.9-inch AMOLED capacitive touchscreen display that provides vibrant, clear images and deep, rich colors. 

The device is 5G-ready, enabling rapid data downloads and seamless streaming experiences. It runs on a robust Snapdragon 888 processor, ensuring swift response times and an overall smooth user experience.

Additionally, the ASUS Zenfone 8 features a dual-camera system, including a 64 MP wide camera and a 12 MP ultrawide camera for high-quality photography.