Super Bright: The maximum brightness is 42000mcd, and it can be bright for more than half an hour in one minute by hand. After the battery is fully charged, the 3 LEDs can light up for 8 hours at the same time, listen to the radio for 100 minutes or sound an alarm for 150 minutes. Radio function: frequency range FM88- 108MHZ, output power at least 0.8W, crank for one minute, radio 10 MIN, left and right adjustable switch. Alarm function: The alarm sound pressure n is not less than 84 dB. Either way, it will ring when you press the button. If you find the volume is low, you should immediately turn it up to generate electricity and supplement the power. Easy to use: easy to use, no need to change the battery, it can be loaded by hand; the shape is unique, cute and feels good. Suitable occasions: flood relief, field exploration, mountaineering, camping, hiking and other occasions can be used.