Computter - electronic putting aid

the computter come,s in it's own leather brief case ideal for putting at home or the office .comes with 2 golf balls ,a putter & a computer you can also use your own putter or balls. Take the computer out, lay on the floor & it will tell you the distance to the hole ,the green speed  and how hard you have hit the ball ,and analyse your power and length of your shot .ideal for playing indoors on those rainy days.