Model POCO X4 PRO 5G | Built-in Memory 128 GB | RAM 6GB | Black | 3G | LTE | 5G | OS Android 11.0 | Screen 6.67" | 1080 x 2400 | AMOLED | CPU Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) | Memory Card Micro SDXC | Dual SIM | 1x