Here are the detailed specifications of the Lenovo ThinkPad X250 (Core i5 5th Gen):

General Specifications

• Model: Lenovo ThinkPad X250
• Processor: Intel Core i5-5200U or i5-5300U (5th Gen, dual-core, up to 2.9 GHz with Turbo Boost)
• RAM: 4GB or 8GB DDR3L (Upgradeable to 16GB)
• Storage: 128GB/256GB SSD or 500GB HDD (Supports SSD upgrade)
• Graphics: Intel HD Graphics 5500
• Operating System: Windows 7, 8.1, or 10 (Upgradeable)

Display & Build

• Screen Size: 12.5 inches
• Resolution: HD (1366x768) or Full HD (1920x1080)
• Display Type: LED-backlit, Anti-Glare, Optional Touchscreen
• Build Quality: Rugged ThinkPad design, lightweight and durable

Connectivity & Ports

• USB: 2x USB 3.0 ports
• Video Output: HDMI, Mini DisplayPort
• Networking: Gigabit Ethernet (RJ-45), Wi-Fi, Bluetooth 4.0
• Other Ports: SD card reader, 3.5mm audio jack

Battery & Power

• Battery:
  • Internal 3-cell battery (23.2Wh)
  • External 3-cell (23.2Wh) or 6-cell (72Wh) battery options
• Charger: 45W AC Adapter

Additional Features

• Keyboard: Backlit (optional)
• Webcam: 720p HD
• Security: Fingerprint scanner (optional), TPM 1.2