Portable toolbox, a collection of eight gadgets.

1. Ruler: a small tool for measuring length in metric and English systems.
2. Noise test: the ambient sound decibel is detected by the mobile phone.
3. Protractor: a small tool for measuring the Angle of objects, which can be photographed and measured by the camera.
4. Test the Internet speed: test the current Internet speed of your mobile phone.
5. Level: a small tool that can be used to know whether it is horizontal by placing the mobile phone on the test object.
6. Hanging picture calibration: a small tool to quickly check whether the pendant in the home is neat.
7. Compass: fast and accurate positioning gadget, no longer lost.
8.Mirror: the sharp front-facing camera is perfect for mirrors.