As a solar radio or hand-crank radio without electricity, it is perfect for a variety of outdoor activities, whether hiking, skiing, camping, at the beach, or in everyday situations. Even during a picnic in the countryside, the hand-crank radio reliably provides musical entertainment. In dangerous situations, such as storms, it serves as a reliable companion and delivers useful information as an emergency radio. The Midland ER300 Power Bank features four power sources: a dynamo coil, a solar panel, a built-in Li-Ion battery, or simple rechargeable AA batteries (6 pieces, not included). It includes a USB port, 25 hours of battery life, an SOS Morse code flashlight, a powerful flashlight with a Cree LED (130L), an ultrasonic dog whistle useful for rescue teams, AM/FM radio, a digital clock, a headphone jack, a telescopic antenna, and a wide, bright LC display with backlighting.