Lenovo ThinkPad T420 (English) User Guide - Page 35
Specifications, Universal Serial Bus USB connectors - bluetooth
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• 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 • 1 eSATA/Universal Serial Bus (USB) connector (on some models) • IEEE 1394 connector (on some models) • RJ11 Modem connector (on some models) • RJ45 Ethernet connector • Serial Ultrabay enhanced • ExpressCard slot • 4-in-1 digital media card reader (SD/SDHC/SDXC/MMC) • Smart card reader (on some models) • Docking connector Optical drive • Multi-Burner drive Wireless features • Integrated wireless LAN • Integrated Bluetooth (on some models) • Integrated wireless WAN (on some models) • Integrated WiMAX (on some models) Security features • Fingerprint reader (on some models) Specifications Size • Width: 340.5 mm (13.4 inch) • Depth: 233 mm (9.05 inch) • Height: 30.1 to 30.5 mm (1.18 to 1.20 inch) Heat output • 65 W (222 Btu/hr) maximum, 90 W (307 Btu/hr) maximum, 135 W (460 Btu/hr) maximum, or 170 W (580 Btu/hr) maximum (depending on the model) Power source (AC adapter) • Sine-wave input at 50 to 60 Hz • Input rating of the AC adapter: 100 to 240 V AC, 50 to 60 Hz Chapter 1. Product Overview 17