First of all Genuine product! So far as quality is concerned it is top notch. This is basically for kids, has got 44 keys, so if you are planning to teach your child playing keyboard, this can be a exteremely good product in the price range. It has option to connect to external sound boxes hence can also be used for stage performaces and parties. 5 durm pad options including tabla, 50 different sound patterns, and you can switch between piano and harmonium (Indian). Overall its a very good product for your kids. Quality of inbuilt sound is also very good. Two power options available -- DC and 6nos. AA Batteries (not sure about the life of batteries it will last). Regarding the adapter its free but not inside the box. will have to buy from specific buyer (Cloudtail in my case) and add both the keyboard and adapter in the cart. The price will be automatically adjusted during checkout and it will come to you in seperate package. Extremely satisfied with product and overall buying experience.