These are some common tools used to work on this device. You might not need every tool for every procedure.
The troubleshooting guide can be found here: CrystalView NB4-35788 Troubleshooting.
This device is a 7" tablet/laptop convertible manufactured by Shenzhen Kinstone D&T. The operating system is Android Jellybean 4.1. It contains a built-in front camera and keyboard. The model number can found on the back of the notebook. It is located on the left-hand side of the device inside a white-outlined box. It contains the model number along with other device specifications.
The following links contain information about device features and common problems experienced with the CrystalView NB4-35788.