Size:Volkswagen Text Measurement：65mm/2.56inch Diameter Circular Shape;This size can be put into nearly every car of different models. Charging Method One: Solar Energy Charging;Charging Method Two: USB Charging;With solar panels,it can absorb solar power,it can be manually charged by USB; Product Material:Acrylic;An intelligent chip is embedded into the product. If exposed in the daylight, it can be charged automatically and swiftly. Meanwhile, it is compatible with USB charging, with a Micro USB interface, the same as most Android phone’s. Also, the intelligent chip contains the program which can prevent the battery from over-charged. Such design greatly increases the life span of the embedded lithium battery. Once you received this product, please find a toothpick or pin or nib to push the button at the bottom of this product. Pushing it for about 4 seconds can turn it on. Afterwards, pushing it shortly can switch the colors, by the following sequence, red, blue, green, yellow and white. You can choose whichever light color you like. What needs to be noticed here is that if the product is turned on during the daytime, you may overturn it and put it on the desk, or you can take it into a dark room to turn it on and switch the color. If it is exposed in a strong lighting environment, the light will be turned off automatically after turned on. The reason is that this product has an embedded light-sensitive chip, only during the night should it emit light.After testing, you can simply place it into the car holder. Then, the product will enter the standby mode if the car is not turned on. The embedded chip will sense it is daytime or evening. Therefore, if you drive during the evening, the product will emit light in your car.
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