Sleep tracker

Well...You know,I am difficult to awake in the morning.Especially,During the cold winter season.Then I found this tool.

"Sleep tracker!!"

**explanation**
An innovative device designed to monitor your sleep cycles and awaken you at the optimate moment, leaving you refreshed and ready to start the day.

Sleep tracker Official site http://www.sleeptracker.com/

σ(；´Д`)well｡｡｡

Isn't it expensive??

The alarm clock is 20,000 yen ???
Does anyone use this tool?

I am still thinking...