Duracell 3in1 Crank Light (Flash, Radio, Charger)-2 Pks Set of 2! This 3 in 1 unit recharges by manual hand cranking. Compact with portable head phone jack. Self-powered, easy-to-wind crank-light provides up to 30 minutes of light with one minute of cranking. AM/FM/Weather Band radio dial with built in speaker and volume control dial Charge internal batteries and External USB Devices by Cranking the handle