Introduction: -Hand-cranked emergency charger: Whether it is in indoor office, field trip, business trip or on the road, when the mobile phone is powered off, the power is instantly replenished, and the product is compact, and can be carried in a pocket, wallet, briefcase or suitcase. -It can be used in an emergency when the mobile phone is powered off, eliminating the need to charge the mobile phone when going out. -There are indicator lights that can be used as emergency lighting.