Solar Flash Key ring Pen

This product makes costume logos and images blink by solar power? No batteries required? Operated by natural light (solar system)? High visual effect by blinking or progressive presentation? Semi-permanent (about 10 years)? Economical (low price for high advertising efficiency)? Widely applied for various usage (mobile straps, promotional gifts, key rings, accessories, etc...)? Sizes range from 30mm x 13mm to 50mm x 20mm