Always ready crank power, no batteries needed, Three super bright white LEDs 12,000-15,000 MCD, USB chargeable, Ni-MH battery: 3, 6V 80mA, Output voltage: 4, 8V 150mA, Charging frequency: 120rpm/60 seconds, One minute of cranking = 2 minutes of talk time, Charging light to indicate charging in progress, SKU: HYPRM5065