Description: lp66waterproof grade: NO fear of any bad weather, can also be used in rainy days, the warning effect is stronger. USB fast charging and five-speed dimming: Universal USB charging port, anytime, any- where, fast charging with silicone seal, wa- terproof and dustproof effect is good, five-speed dimming, easy switching, high-efficiency circuit, long-lasting bat- tery life. High lumen lamp beads: Super bright white light head lights 100 lumen high brightness output, daytime warning, night additional lighting. Intelligent induction brake warning: Built-in speed sensor, when the sensor body slows down, the car lights continue to highlight for 3 seconds. Real-timebattery indicator and easy to install: In the power-on state, the power in dicator flashes every 5 seconds, in the power-off state, press the switch, the indicator shows theremaining power, easy to install and remove only one silicone band is needed to fix bicycle light. Specification: Material: ABS plastic Gear: 5 Discovery distance: >1000m waterproof level: IP66 E-105 headlight: brightness: 30-100LM : 3-23 hours Battery: 500mAh Smart mode: No Brake sensing: No E-105R ordinary rear lamp: brightness:8-30LM : 4-24 hours Battery: 400mAh Smart mode: No Brake sensing: No E-105S smart rear lamp: brightness: 20-120LM : 2.5-24 hours Battery: 500mAh Smart mode: Yes Brake sensing: Yes Size Chart: 33x33x23mm/1.30x1.30x0.91 inch Package Includes: 1 Piece Light 1 Piece Elastic Band 1 Piece USB Charging Cable Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!