Size: 11.7 cm (L) x 5.2 cm (W) x 3.9 cm (H)
Use 5 PCS super bright white LED
4 Functions:
Lighting: One minutes wind-10 minutes light for 5 LED, 15 minutes light for 3 LED.
Siren Sound- one minutes wind can sound 5 minutes for siren.
Charging mobile phone- 3 minutes winding can offer 10 minutes Talking time
Use as a Compass
Weight: About 100g