Lenovo ThinkPad T420si (English) User Guide - Page 32
Universal Serial Bus USB connectors, Always On USB connector
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• mSATA solid state drive (on some models) Display The color display uses TFT technology: • Size: 14.01 inch (355.6 mm) • Resolution: - LCD: Up to 1600-by-900, depending on the model - External monitor: Up to 2048-by-1536 • Brightness control • ThinkLight • Integrated camera (on some models) • Multitouch panel (on some models) • Built-in microphones (on some models) Keyboard • 89-key, 90-key, or 94-key • UltraNav (TrackPoint and multi-touch touch pad) • Fn key function • ThinkVantage button • Volume control buttons • Speaker mute button • Microphone mute button Interface • External monitor connectors (VGA and DisplayPort) • Combo audio jack (stereo headphone or headset) • 2 Universal Serial Bus (USB) connectors • 1 Always On USB connector • RJ45 Ethernet connector • Serial Ultrabay Slim • Smart card reader (on some models) • Docking connector Combination card slot for ExpressCard or flash media card • 34mm ExpressCard or 4-in-1 digital media card reader Optical drive • Multi-Burner drive Wireless features • Integrated wireless LAN • Integrated Bluetooth (on some models) • Integrated wireless WAN (on some models) 16 User Guide