I showed HandVoice on desk top computer and explained how to use it first. And next I did it on wearable computer like using it in town. I mean I explained how to use HandVoiceWearable in Town, for instance in a hospital, in a bank or in a department store. They understood it very quickly and they tried to use it.
Actually they could speak several words.
Their trial impressed me very much. They showed me about real SELF HELP. And HandVoice was very useful to it, I confirmed.