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The light is turned on automatically by sensor on the side.
The user put coins, the sensor weigh the coins and the light is getting more bright in proportion to its weight. Once the user put coins, the light lasts for 10 seconds.
And also, the users know how much they close to their plans through the brightness of the light. If the light is not bright enough, it motivate user to save more money .
Furthermore, users can draw anything they want to buy and put it in the front of the saving box. In addition, people can use it as a lighting in the evening as well.
From now on, let's saving light of your wishes!