First time it was delivered to me, I discovered in a 2-3 days that the product does not work on batteries. As soon as you turn on and press a key it would switch off. So I requested a replacement which arrived the very next day . The first thing I did this time was to put in the batteries and press a key and it switched off. Basically same defect in two pieced that were delivered to me. Finally I requested return and refund.