1. Manual power generation --- When the flashlight is charged via a USB emergency charger in the absence of a power supply or when you want to use manual power generation, the rotation speed during manual power generation should be higher than 120 revolutions per minute. It is recommended that the rotation speed be between 120 and 140 revolutions per minute. 2. Multiple functions --- The rechargeable LED flashlight can not only provide you with ultra - bright light like a regular lamp; it can also serve as a power bank to charge your phone, receive information as a radio, and be used as an alarm for calling for help. 3. High - quality --- The hand - cranked flashlight is made of high - quality ABS material. It is portable, lightweight, durable, and sturdy enough to meet long - term daily use. 4. Easy to carry --- The mobile phone charger with a flashlight is designed with a rope. You can hold it in your hand, hang it up, place it on the ground, hold it in your hand, or hang it on a tree branch, tent, etc. 5. Applicable scenarios --- The radio flashlight and hand - cranked flashlight are suitable for outdoor camping, hiking, going out at night, and can also be used in emergencies such as earthquakes, tsunamis, and power outages.