I used Dyson's portable hushjet fan through the UK heatwave – it's in 'another league'

★★★★☆What we love: High build quality, excellent power, and a rotating headTake note: Loud at full power, limited features, and expensive“The Dyson fan is small and light enough to slip it into my bag without adding bulk or weight. There are five power modes, and the noise ranges from whisper-quiet at 65.6 dB to 83.4 dB at full throttle. As its internal fan mechanism cranks through the power options, it’s able to kick out a surprising amount of air – I recorded 14.1 m/s at the lowest and 15.3 m/s at the highest, while the booster function touched just over 20 m/s.The fan has app connectivity, but I found the direct controls more innovative – the app wasn’t really needed for the most part. The speed is adjusted through an intuitive rocker switch: when you reach the highest speed, you can push and hold the rocker to “boost” a turbo charge of airflow. The cylinder design is comfortable to hold, although the air intake at the base sometimes gets covered by my hand. The rotating head enables direct airflow. If you wear the neck lanyard, you can keep a gentle flow of cooling air rising, which was surprisingly effective.The targeted airflow can be widened by holding it further away, while the charging dock allows you to position it as a desk fan (note that speed is capped at the lowest setting in the dock). A carry case completes the set. While the noise at full blast could draw attention in public, it’s an impressive, highly portable device with cooling power.”Dimensions: 38 x 38 x 180mm Weight: 0.21Kg Fan power: 40W Speed modes: 5 Noise: 72.5db Charge time: 3 hours Run time: Up to 6 hours on fan speed 1 Controls: Direct / App