Detection function: With PIR motion sensor (passive infrared sensors), this headlight has powerful infrared human body detection function, instant ignition, convenient and energy saving. And the detection distance, angle, time and illumination can be set and adjusted manually.High Brightness: The use of high quality and high efficiency SMD 2835 LEDs make this lighthouse particularly bright and long lasting. 4000 lumens of light and 50W: can replace a traditional 400W incandescent bulb, saving over 85% of energy on your electricity bill.IP44 Waterproof: Made of die-cast aluminum and tempered glass, the headlight is IP44 waterproof, rustproof and surface treated with high quality electrostatic material, can be widely used in indoor and outdoor lighting projects. Perfect Design: Aluminum body with tempered glass diffuser for excellent light transmission. The high quality aluminum makes the lamp more resistant. The nanometer material reflector is safe and durable. Furthermore, the diffusion is 1.4 times higher than traditional LED lights.Good Heat Dissipation: The ultra-thin design and the use of 2835 high auto heat dissipation LEDs ensure the best heat dissipation performance, the headlight can quickly lower the temperature and thus ensures the long life of the headlight and safety use.