1. Long life 19 LED lights-----over 100000 working hours. 2. Powered by 3*AAA batteries last for about 20 hours. 3. water-resistant. 4. Light on by on/off switch. 5.Adjustable Inclination. 6. 7LEDS, 9LEDS, 12LEDS,14LEDS,16LEDS are also available.