The HP ProBook 640 G2 is a business-oriented laptop that was released as part of HP’s ProBook series. It is designed to provide a balance between performance, security, and portability for professionals and businesses. Some of its key features and characteristics may include:

1. Design and Build: The ProBook 640 G2 typically features a sleek and professional design with durable construction. It’s meant to withstand the rigours of business use and maintain a polished appearance.
2. Display: The laptop likely offers a 14-inch display with a resolution that can vary between HD (1366 x 768) and Full HD (1920 x 1080) depending on the specific configuration. The display is designed to provide good visuals for work tasks and presentations.
3. Performance: The laptop is powered by various Intel Core processors, ranging from Core i3 to Core i7, depending on the configuration. It’s meant to handle typical business tasks such as word processing, web browsing, and light multitasking.
4. Memory and Storage: The ProBook 640 G2 should offer a range of RAM options, typically starting from 4GB and going up to 16GB or more. Storage options include traditional hard drives and potentially faster solid-state drives (SSDs) for improved performance.
5. Connectivity: The laptop likely includes a variety of connectivity options such as USB ports (including USB-C), HDMI, Ethernet, and audio jacks. Some models might also have features like mobile broadband for on-the-go connectivity.
6. Security: As part of the EliteBook series, security features are emphasized. This could include a fingerprint reader, an integrated smart card reader, and security management software for data protection.
7. Operating System: The laptop would have originally come with Windows 10 Pro or a similar business-focused operating system.
8. Battery Life: Battery life can vary based on usage and configuration, but the laptop is typically designed to offer decent battery life to keep professionals productive while on the move.
9. Portability: With a 14-inch display, the ProBook 640 G2 is designed to be portable enough for business travel or working in different locations.
10. Upgradeability: Depending on the model, there might be some level of upgradeability for components like RAM and storage, allowing users to tailor the laptop to their needs.

Keep in mind that specific details and configurations can vary based on the exact model and release date, so it’s recommended to check the official HP website or product documentation for the most accurate and up-to-date information about the HP ProBook 640 G2.