... back light/bicycle LED lampBright LED light, energy saving, low power consumption, long service life. Light weight, easy to use and ... ,then in a colorful box.Product features:1. Cranking for power generation2. Control by electronic switch, long life-span3. Unique ... ,then in a colorful box.Product features:1. Cranking for power generation2. Control by electronic switch, long life-span3. Unique ...