Form factor - it's very compact, with good key spacing ; Rechargable

First and foremost, it doesn't work. I was not able to establish a bluetooth connection with either my iphone or my ipad ; The manual isn't very well done; for example at one point it refers to the device as headphones. It doesn't explain the function...

Easy to Sync

Its tiny, it can fit in the palm of my hand. There is a delay of about 30-45 seconds when hitting keys