 In front of us, we have the lightest 14-inch business notebook on the market. Depending on the configuration, the device can stop the scales at just 880 grams. But there is more to it than what meets the eye. Software-wise, ASUS offers one of the most sophisticated AI-controlled noise cancellation algorithms. And you know what makes it even better? That it works both ways. This allows you to have pristine quality conversations with it being able to suppress constant noise like that of an airplane you're flying with, or high-pitched ones like a baby crying. But hey, this is not a headphones review, so let's get back to the expert book B9. We mentioned that the weight depends on the configuration, and this is because the larger battery option is slightly heavier, and with it, the laptop stops the scales at 1 kilo. Still, an impressive result. The entire assembly is also very thin, with the profile standing at just 14.9 millimeters. ASUS was able to do that thanks to the implementation of magnesium lithium alloy, so the laptop's body is pretty strong as well. Other features include the full array of sensors above the display, such as an IR face recognition scanner, and a proximity sensor. Also, the base houses the number pad 2.0, which is pretty self-explanatory. However, it's worth noting that there is no other business laptop brand that offers the feature. 14.9 millimeters should be a very limiting factor in regards to IO, right? Wrong! Here, you find two Thunderbolt 4 ports, an HDMI 2.0 V connector, a full-sized USB port, and an audio jack. In addition, there is a micro HDMI connector, which splits out to a LAN port through a dongle, which comes as an option. By the way, you can lock the USB ports, which is another good security feature of the expert book B9. Again, due to the ultra-thin profile, you have to forget about memory upgrades. However, you can spec the laptop all the way up to 32 gigabytes of LPDDR4X RAM, working at Quad Channel. What surprised us, though, is that the expert book B9 not only has an upgradable SSD via M.2 slot, but there are actually two of them. This is important because you could take advantage of a RAID configuration, making sure that the data of your business will be safe, even in case of an SSD failure. It is good to see that the B9 comes with a high-quality IPS display. It has a 1080p resolution, comfortable viewing angles, and a very good contrast ratio. Moreover, it covers 99% of the sRGB color gamut. This ensures a vibrant image, while the color accuracy is on point for professional work. If you're planning to look at it for long periods of time, you will be happy to know that there is no PWM for brightness control. The device we're reviewing has the larger 66-watt-hour battery, and it is an absolute unit when it comes to screen-on times. We got about 17 hours of web browsing or 13 hours of video playback on a single charge. That's really impressive. Performance-wise, you are treated up to a Core i7-1185G7, which has V-Pro support. Now, imagine you need something done on the fly, and it is to edit a photo and assemble it in a presentation, right? Then, you need the highest possible clock speed to achieve it in a hurry. Well, the expert book B9 manages not only to run at, but also to sustain 3 GHz on all cores. This is truly exceptional for a laptop that is thinner than 15mm and weighs no more than 1 kilo. And the best part about it is that you can feel the heat through your fingers. If all business devices had the feature package of the expert book B9, the world would have been a better place. Well, okay, at least the notebook market. This laptop is extremely compact and makes conference calls a lot more pleasant thanks to the AI noise cancellation. But what's even more important for business users is that security is on point. With the IR and fingerprint biometric login, the option to lock the USB ports and the webcam shield. The reliability is also unquestionable with its tough chassis that has passed military-grade standards and the option to protect your data through a RAID configuration. Sounds like the ideal partner in a corporate world, doesn't it? If you're interested in expert book B9, check out our in-depth review on laptopmedia.com. There are many more tests and analyses which could be interesting to you. And don't forget to subscribe to our channel. Thank you!