Lenovo ThinkPad W540 (English) User Guide - Page 29
Specifications, Operating environment, GPS and wireless features, Security features - bluetooth
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GPS and wireless features • Global Positioning System (GPS) satellite receiver (on some models) • Bluetooth • Wireless LAN • Wireless WAN (on some models) • NFC (on some models) Security features • Fingerprint reader (on some models) Specifications This section lists the physical specifications for your computer. Size • For T540p models: - Width: 376.6 mm (14.83 inches) - Depth: 248.1 mm (9.77 inches) - Height: 27.9 to 29.5 mm (1.10 inches to 1.16 inches) or 29.9 to 33.9 mm (1.18 inches to 1.33 inches) • For W540 models: - Width: 376.6 mm (14.83 inches) - Depth: 248.1 mm (9.77 inches) - Height: 27.9 to 29.5 mm (1.10 inches to 1.16 inches) Heat output (depending on the model) • 65 W (222 Btu/hr) maximum • 90 W (307 Btu/hr) maximum • 135 W (460 Btu/hr) maximum • 170 W (580 Btu/hr) maximum Power source (ac power adapter) • Sine-wave input at 50 to 60 Hz • Input rating of the ac power adapter: 100 to 240 V ac, 50 to 60 Hz Battery life • For the percentage of the battery power remaining, check the battery status icon in the Windows notification area. Operating environment This section provides information about the operating environment of your computer. Environment: • Maximum altitude without pressurization: 3048 m (10 000 ft) • Temperature Chapter 1. Product overview 13