Güneş Cetveli 10 cm Cetvel Mini Dijital Hesap Makinesi 2 In 1 Çocuk Kırtasiye Okul Ofis Hediyeleri

No I still understand how it works after I add it charges in the sun but you do an operation for example (assembly) and you have a lot it doesn't work and it needs to be charged so I don't recommend it even if I bought it for 1 leu it's useless

It only works if I shine the phone flashlight over it and it's very hard to press the buttons

The calculator on the ruler is not working, there is a problem with the solar battery. I want a refund.

It is a very interesting thing, my child at school uses it, he is satisfied.