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Latching technology has changed slightly since the CF-30. Tweaking the equalizer settings using the included SmartAudio control panel helped a little.

It wasn't the best quality, though both high and low tones weren't as defined as midrange sounds. We were easily able fill our office with Jay-Z's 'Encore' streamed from Pandora. While the CF-31 only has one front-mounted speaker, it was plenty loud. The resistive touchscreen is very responsive, with just the right amount of sensitivity for double-clicking and scrolling with the included stylus or your fingertip. Viewing angles were limited to a few degrees off-axis, but given that the target audience of this notebook places a priority on security, we don't consider this to be a weakness.

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While watching an episode of Friday Night Lights on Hulu, at full brightness the screen was almost too illuminated and washed out, but colors such as the reds and blues of the football players' helmets were vibrant. Even with the brightness turned almost all the way down, icons on the screen were still quite visible. At 1,100 nits, it's exceptionally bright: about 5 times that of typical notebooks, which tend to be in the 200-nit range. We also really liked the brightness range of the screen. Once again, though, this is to the CF-31's advantage. The screen has a somewhat anachronistic aspect ratio of 16:10, where most notebooks are of the 16:9 widescreen variety. The 13.3-inch display on the CF-31 has, by today's standards, a somewhat low resolution of 1024 x 768, but it's ideal for touchscreen applications, as it's easier to press larger icons. (We consider anything above 100 degrees to be hot.) Additionally, a concealed mode turns off or dims the screen, all LED lights, and sound at the press of a button, which is a good feature when you're on a stakeout.ДЄfter playing a Hulu video at full screen for 15 minutes, the touchpad on the CF-31 registered 89 degrees Fahrenheit, the space between the G and H keys was 91 degrees, and the middle of the underside was 99 degrees. Security options for the CF-31 include a Smart Card reader, fingerprint reader, and Trusted Platform Module (TPM) v1.2. However, we noticed that the latches for the smaller ports would pop open after we dropped the machine.Д«ut Mother Nature isn't the only thing this notebook is protected against.

The machine withstood every challenge, and continued to operate normally. We also poured 12 ounces of water on the keyboard, and stood on the lid.

To test some of these claims, we dropped the CF-31 several times from 6 feet (turned off and closed) and 3 feet (turned on and open).

It can also withstand up to 310 pounds of pressure on its lid. It can survive 31 minutes of 70-mph wind and 5.8 inches per hour of rain blown at it, and 26 drops from 72 inches while turned off (36 inches while turned on and open). That means, among other things, it can withstand operating temperatures from -20 to 140 degrees Fahrenheit (-40 to 160 degrees when turned off), and altitudes of up to 15,000 feet. While the CF-30 met the MIL-STD-810F durability standard, the CF-31 is made of tougher stuff, and is designed to meet specifications for ingress protection (IP-65) and durability (MIL-STD-810G).

Panasonic toughbook serial number lookup