1. producing electricity using a crank 2. AM/FM radio function, built-in radio antenna 3. lighting function, 5 LED 4. emergency sound alarm function 6. the USB cable can be used to charge the radio 7. Emergency charging function for hand-cranked mobile phones (charging head needs to be provided) 8. the wrist strap is convenient to carry and prevents the product from falling 9. technical parameters: 2.3 Radio frequency: FM: 87.5- 108MHZ or 76- 108MHZ AM: 520- 1710khz 2.4 The alarm sound is higher than 90dB 2.5 DC IN/USB IN 5V 2.6 DC OUT 5V mobile phone charging interface and digital product charging interface. 2.7 Rechargeable battery: 3.7V/120MAH 10. instructions for use: 3.5 The LED torch works place on SIREN, the siren works. 3.2 Push the volume back to adjust the radio volume, and at the same time, put the frequency switch push button to FM or AM position, turn the radio tuning, select the desired ESC radio. Stretching the wristband antenna or moving the direction of the radio can achieve a good radio effect. 3.3 Insert the USB DC port or adapter port into the input, you can charge the rechargeable battery inside the unit, usually 3-4 hours for a full charge. 3.4 Connect the cable of the cell phone or digital product into OUT, and turn the crank to charge the cell phone or digital product. When using the crank, be sure to turn off the product while charging. 3.5 The crank must rotate at 120-140 revolutions per minute to recharge the device.