Hand crank & Dynamo energy Solar charge Led: Using 5pcs ... AM: 525KHZ~1700KHZ Technology parameter and instruction1. Hand crank & Dynamo energy (D29 A/C generator)2. Solar charge, ... Battery: Use AA*3PCS9. Power source by hand crank, solar energy, dry battery andDC assistant charger10. Can ... based on 120cicrcles/Minuteshand cranking. After 3 minutes crank, flashlight can use 30-40 minuteslighting, radio can ...