Wearable

Undelivered promises. A smart and light aluminum case, flawless build quality, a bright OLED display, reliable satellite connections and all currently for under $170. The Amazfit GTS 4 enjoys an impressive set of features. Unfortunately, it's a smartwatch that fails to keep all its promises.

Tap into the sun's power on the go. PEARL offer a solar panel that weighs less than 1 kg and is about the size of a book when it is folded together - but is supposedly able to deliver 28 watts when folded open. You are supposed to be able to attach it to your backpack or bike or use it while you are camping, in order to use the sun's energy to charge your phone or power bank. We took the "on-the-go" panel with us on our bike tour from Berlin to Poland to see how well it works in practice.

Belt instead of a chain. The ADO Air isn't supposed to transport heavy goods or complete a bike tour around the mountains - the Air 20 is a hobby bike, a city speeder! This is thanks to its folding mechanism, belt drive, single-gear drive, seating position and relatively light weight. We have put the foldable speedster to the test.

New Search for Meaning. The Sense 2 is Fitbit's top smartwatch. It comes with many sensors, an aluminum casing and Google apps. It can also be used for phone calls and payments. Our review explains who should take a closer look at the Sense 2 and who should keep their hands off it.