Describe


This device has no voice, also do not have the sound, do not adjust display Angle.


This device for solar add button battery power supply, solar energy is not refers to the charge, but in the light of circumstance can use!


Three, for ordinary calculator, this calculator is not a scientific calculator, with no function, statistics, such as complex calculation function.
【 specification 】 165 mm * 103 * 12.5 mm