1、HD Screen: This HD smartphone features a 5.0 inch UHD screen with 1920x1080 HD resolution. With vivid colors and high definition, it brings a broader visual experience and lets you explore every detail. 2、Octa Core CPU: 5.0 inch smartphone is equipped with the latest for Android 11.0 system, MT6580 octa core CPU and up to 2.0GHz, 12nm processor. Enough mobility and responsiveness to run multiple applications. 3、Large Battery: The smartphone is equipped with a large 4800mAh battery with 17 hours of talking, 24 hours of listening to music, 6 hours of playing games, etc. AI battery management reduces cache and saves power. 4、3 Card Slot Design: This unlocked smartphone supports dual SIM cards and memory cards, SIM card bands only support 2G networks GSM:850 900 1800 1900; 3G networks: WCDMA:850 2100. memory cards support expansion up to 32GB. 5、Front and Rear Camera: This cell phone is equipped with a front 5 million and rear 8 million camera, you can take photos, selfies or videos, record good times anytime and anywhere. Touch capacitive screen, support face recognition. Item Type: Smartphone Material: Plastic, Electronics Model: S21 Ultra Color: Green Chip: MT6580 Octa Core CPU Network System: GSM: 850, 900, 1800, 1900, WCDMA: 850, 2100 GSM 4 Band Dual SIM Dual Standby Screen Size: 5.0 Inches TN (The display is designed with graceful rounded corners, inches is the diagonal length of the display when the rounded corners are stretched to right angles) Resolution: 1920 x 1080 PX RAM: 2GB ROM: 16GB Function: Face Recognition with WIFI, BT, FM Interface: Micro USB, 3.5mm/0.1in Standard Headphone Jack System: For Android 11.0 Support Memory Card: Maximum Support for Expansion 32GB Card Slot: Three Card Slot (Support for Simultaneous Installation of Two SIM Cards and A Memory Card) Front Camera 5MP, f 2.0 Aperture, Fixed Focus Rear Camera 8MP (Color, f 1.8 Aperture) Autofocus Battery Type: Built in 4800mAh Lithium Battery (Included) 1 x Smartphone 1 x Earphone 1 x Adapter 1 x Charging Cable 1 x Protective Case 1 x Protective Film 1 x English Manual