Three interconnected screens in one cell phone can work in various modes, even if you use different apps simultaneously. The keyboard is located on the back of one of the folding elements. Advanced users hope that the project’s production is launched as soon as possible.
You can find it on Amazon.com! Look in the "Sports & Outdoors" tab for "Sawyer Products B4 Extractor Pump Kit". The price right now is $16.99.