Wave goodbye to parking fines caused by your great forgetfulness. This ParkOne Solar does not run out of battery. This smart electronic parking disc from ParkOne is equipped with a rechargeable battery that is charged with 100% solar energy, so you never have to change the battery. When you park your car, the dial switches to the nearest quarter, and it automatically switches between winter and summer time. One would think it is specially designed for us who forget everything. So specially designed that the designer, John Sebastian, has spent 3 years developing it. He has worked hard for 3 years, day and night, to make sure you can get this smart, electronic parking disc for your car, so the least you can do is buy it. Product information: Solar driven Never runs out of power Automatically switches between summer and winter time Designer: John Sebastian Colour Black Material: Plastic, glass Size: H: 10, W: 10, D: 1.5, Ø: 10 cm Weight: 80g Battery type: Li-ion