This is a splittable 40 pin male-female jumper wire, it is super flexible, can be transformed from 1-40 pin jumper wire. With some of these, you will no need to worry about the jumper wires you got before do not fit your project, just split it and go.
This pack includes: 2 pcs 6-pin lengthen female headers 2 pcs 8-pin lengthen female headers They all have 2.54mm spacing between pins and they are the perfect height for clearing the USB-B connector and great for stacking multiple shields.Their long legs also make it enough to connect a shield to an Arduino Main Board.
D-duino can be programed like Arduino. It has a display(0.96 inch OLED) so I call it D-duino. Also you can use LUA control this board like NodeMCU. You can understand this is NodeMCU+OLED. I think the 0.96″ OLED will be very helpful for makers to develop IOT.