but due to the shipping, there is exist the the part accessories of product damage question.
But please don't worry, because:
1. we will pack the product carefully.
2. the probability of shipping damage is small. about 2%.
3. even you met this question, we must be help you solve it. because these question which cased by shipping is easy to solved----Because some parts of the machine are easily squeezed by external forces and cause errors, manual debugging is required. we will teach you if you don't know about it.
as the on-off button, in order to avoid shipping damage, we has been upgrade it, use red instead of silver.
please take the left button as reference.
If you have any questions, welcome to contact us~