This is a novelty item that came with the purchase of a bicycle light. It's unopened, so it's unknown if it works. This is for those who understand it has been stored by an amateur. It will be simply packaged and shipped via post. ▼Translated Instructions Solar-powered tail light Bulbs: 2 ultra-bright red LEDs 4 functions: Flash mode 1, Flash mode 2, On, Off Note: Turn off the light and place it in the sun as shown in photo 1. Charging time: 4 hours in lighting mode, 8 hours or more in flash mode