No power source is needed. To act as an emergency charger for mobile phone by handle rotation.
High efficiency: To get 3-5 minutes communication by rotation for 3 minutes.
Bi-Functional: To be used as an emergency light with build-in LED.
Portable & Easy to Carry
6V Voltage Limitation
with 5 mobile charger adapter support Nokia, SonyEricsson, Samsung, PDA Phone (5 Pins Mini USB).