Product feature: 1. Pressing for power generation 2. Convenient to use, never need change battery, pressing to recharge 3. High brightness: The Max.brightness can reach 32000MCD 4. the red LED can flash give an alarm, Highest brightnesslightweight size. 7. Wrap strap design, convenient to carry. Main Technical Parameters: 1. lighting A. 2LEDs Max Brightness: 32000mcd, B. Pressing 1 minute at the speed of 2 times per second can provide 4 minutes lighting time of 2 white LEDs or 10 minutes of red LED. 2. Using life Switch life: 10000 times LED life time: 100000 hours Plastic body: 5 years The whole unit: 5 years Use method: 1. lighting (1) Release the hand crank by sliding the rear switch to the back position; hold the main body and pressing the handle at the speed of 3 times per second for power generation (2) Push the switch forward, 2 white LEDs lighting; push the switch medially, 2 white LEDs off; push the switch back, the red LEDs will lighting; then push the switch medially, the red LEDs off (3) Squeeze the hand crank down, slide the rear switch to the front position to lock the hand crank. Notice: 1. Medium squeeze, too hard may reduce the lifespan of the product. 2. Usually squeeze to charge it for longer long lifespan. ( No less than 1 minute every time ). 3. Do not place the unit in high-temperature or high humidity place. 4. The product is not waterproof; do not drop it into water