Specifications: 1. Long life 18 LED lights and 2 red Leds -----over 100000 working hours. 2. Powered by 3*AAA batteries. 3. water-resistant, not waterproof. 4. Light on by on/off switch, some modes of operation can be selected. 5. Adjustable Inclination. 6. The length of band is adjustable. 7. 7+2 LED, 9+2 LED, 12+2 LED, 14+2 LED, 16+2 LED are also available.