Elderly people learning electronic piano which is good, where to buy more assured?

Buy electronic piano for the elderly, of course, to prioritize the convenience of the elderly, such as the sound of the piano to be larger, the interface to be more concise, the display is a little larger, be sure to Chinese display, and then consider the performance of the electronic piano, generally choose a big brand to buy, the quality of the performance of the above should be reliable, the purchase of the way to buy an electronic piano can be purchased online to give your parents, it's very convenient. I bought a Casio WK-6600 for my dad last month at the online flagship store of a cat, large volume speakers, Chinese LCD large display, interface is simple and clear, and now my dad every day with the piano to the park's square dance team accompaniment it.