MMR-77 Hand Crank Emergency AM/FM Portable Radio Powered by Dynamo Hand Crank, 2 AA Batteries (not included) or AC Power Adapter (not included) Charging LED and Tuning LED Indicators 1 minute of winding equals 30 minutes of listening time Illumination lamp also illuminates dial window Built-in Speaker and Emergency Buzzer Water Resistant with JIS  3 Rating