Charge cell phones and other portable devices without electrical supply - comes with 3 pin attachments to fit multiple connections including the classic Nokia phone. The phone is charged with a hand crank that one winds to generate a charge. May also be cranked using one hand operation while you continue your phone call. A minute of cranking/winding provides about 2-3 minutes of mobile talk time or about 20-30 minutes of mobile stand-by time. Having power available at all times off the grid is critical for health workers of all kinds!!