Solder is very clean, everything is aligned nicely, all boards are well packed after function, voltage, current testing, protected in a beautiful box. Up to FCC and CE Standard: made from environmentally friendly components and materials. We have detailed tutorial( included introduction, wiring diagram, test code, driver installation, Example Projects...... Step by step to explain how to use on our wiki page. The kit gives 37 kinds of common sensors, such as Digital LED Module, Analog Temperature Sensor, Photocell Sensor, Ultrasonic Module etc, allow you make a lot of interesting projects like Traffic Light, Magnetic Check, Temperature Test, Joystick Test, Photo-interrupter Test, Alcohol Detection and so on. Designed to learn electronics programming. Great hands on STEM kit to get started with the micro bit. The product needs to be debugged before use, such as an LED display module. Please use an external power supply and debug the backlight brightness. Specially designed for Microbit board. This kit includes a keyestudio sensor shield fully compatible with micro bit and other commonly used 37 kinds of sensor modules. It's compatible with both microbit v1.5 and v2, microbit board not include!.