Thinkpad E15 Gen 3 2021 Model A: R5 5500U Operation System: English Windows 10 Pro Processor: AMD Ryzen 5 5500U @2.10GHz Graphics: AMD Radeon™ Graphics Display: 15.6" FHD IPS 1920x1080 resolution 60Hz 100% sRGB Memory: 16GB DDR4 3200MHz Storage: 512GB M.2 SSD Interfaces: I/O: Right: 1x USB 2.0, 1x RJ45 Left: 1x 3.5mm Audio jack, 1x HDMI, 1x USB 3.2 Gen1, 1x USB-C 3.2 Gen1 Keyboard and Touchpad: Not backlit Audio: Dolby Audio™ Camera: 720p HD Wireless Connectivity: Wi-Fi 6 and Bluetooth 5 Battery and Power: 57Wh 5-8 hours, the specific time depends on the use environment Power Adapter：65W 100-240V adaptive AC power adapter Weight and Dimensions: 1.7kg Approximately 18.9mm x 365mm x 240mm Model B: R7- 5700U Operation System: English Windows 10 Pro Processor: AMD Ryzen 7 5700U 1.80GHz Graphics: AMD Radeon™ Graphics Display: 15.6" FHD IPS 1920x1080 resolution 60Hz 100% sRGB Memory: 16GB DDR4 3200MHz Storage: 512GB M.2 SSD Interfaces: I/O: Right: 1x USB 2.0, 1x RJ45 Left: 1x 3.5mm Audio jack, 1x HDMI, 1x USB 3.2 Gen1, 1x USB-C 3.2 Gen1 Keyboard and Touchpad: Not backlit Audio: Dolby Audio™ & Harman Camera: 720p HD Wireless Connectivity: Wi-Fi 6 and Bluetooth 5 Battery and Power: 45Wh Weight and Dimensions: 1.7kg Length 365mm; Width 240mm; Height 18.9mm Included in the Box: Laptop, charger, and quick start guide in Chinese Model C: R7- 5800U 0HCD Operation System: English Windows 10 Pro Processor: AMD Ryzen 7 5700U @ 1.80GHz Graphics: AMD Radeon™ Graphics Display: 15.6" FHD IPS 1920x1080 resolution 60Hz 100% sRGB Memory: 16GB DDR4 3200MHz Storage: 512GB M.2 SSD Model D: R5-5600U 0GDC Operation System: English Windows 10 Pro Processor: AMD Ryzen 5-5600U 2.3Ghz Graphics: AMD Radeon™ Graphics Display: 15.6" 16:9 FHD IPS 1920x1080 resolution 60Hz 250nits 45%NTS Memory: 16GB DDR4 3200MHz Storage: 512GB M.2 SSD Interfaces: I/O: 1x USB 2.0, 1x USB 3.2 Gen 1, 1x USB C 3.2 Gen 1, HDMI, Combo Jack, RJ45 Keyboard and Touchpad: Not backlit Audio: Dolby Audio™ Camera: 720p HD Wireless Connectivity: Wi-Fi 6 and Bluetooth 5.2 Battery and Power: 57Wh 3 Cell Battery Weight and Dimensions: 1.7kg Approximately 18.9mm x 365mm x 240mm Model E: R7 4800U 2VCD 2020 Operation System: English Windows 10 Pro Processor: AMD Ryzen 7 4800U Graphics: AMD Radeon™ Graphics Display: 15.6" FHD IPS 1920x1080 resolution 60Hz Memory: 16GB DDR4 3200MHz (Onboard 8GB+8GB Upgradable) Storage: 512GB M.2 SSD Interfaces: I/O: 2 USB, 1 USB2.0, 1 USB Type-C, HDMI, Combo jack (microphone/earphone two-in-one interface) Keyboard and Touchpad: Not backlit Audio: Dolby Audio™ Camera: 720p HD Wireless Connectivity: Wi-Fi and Bluetooth 5 Battery and Power: 3-cell battery (45Whr) The specific time depends on the usage environment Power Adapter：65W 100-240V adaptive AC power adapter Weight and Dimensions: 1.7kg Approximately 18.9mm x 365mm x 240mm