Q&Q SmileSolar" is a maintenance free watch that can be recharged by sunlight and indoor lighting. The "SmileSolar" model is eco-friendly and colorful, and is made in part with recycled materials to reduce waste during production. The case is clear so that you can see what is inside. The case is clear so you can see what's inside, and the water resistant to 10 atmospheres for daily life. This simple model can be used in all situations from casual to business. The simple model is suitable for both casual and business use and has a dial with a combination of highly visible Arabic numerals and bars.