I. Core Selling Points 2-in-1 Lighting and Warning Design: Combines front light and rear light functions. The front light has a maximum brightness of 1600 lumens, and the rear light has a maximum brightness of 100 lumens. When both are turned on simultaneously (1600 lumens for front light + 100 lumens white light for rear light), the combined maximum brightness reaches 1700 lumens. The front light focuses on illumination, while the rear light serves both daytime and nighttime warning purposes. It can be switched to white light mode during the day and red light mode at night, providing double protection for riding safety and avoiding hazards. Intelligent Working Mode: Supports an intelligent working mode, which can be activated by long-pressing the front light button for 2 seconds—at this point, the green indicator light turns on and the front light flashes three times. This mode only applies to the front light and can automatically adjust brightness based on ambient light and movement status to save power and extend battery life. When the riding environment has sufficient light, the front light flashes in daytime warning light mode; when the environment is dim, it automatically switches to medium brightness mode (400 lumens) for illumination. If the light remains stationary for more than 120 seconds, it enters sleep standby mode, and can resume normal intelligent mode when vibration is detected or the button is pressed. After entering intelligent mode, the rear light is turned off by default, and pressing the button can switch back to memory mode. Multi-Gear Lighting Modes: The front light is equipped with 5 lighting modes to meet brightness needs in different scenarios. The rear light has 4 modes, including 100-lumen white constant brightness (9 hours and 40 minutes of battery life), 5-lumen white flash (78 hours of battery life), 100-lumen red constant brightness (54 hours of battery life), and 5-lumen red flash (85 hours of battery life). These modes can be flexibly switched according to daytime/nighttime and illumination/warning needs. Long Battery Life and Fast Charging: Built-in with 2 rechargeable 18650 lithium batteries, with a total capacity of 5000mAh. It supports 5V/2A fast charging and only takes about 3 hours to fully charge. In the 200-lumen low flash mode, the maximum battery life can exceed 16 hours. The battery life under different modes is suitable for daily commuting and long-distance riding needs. High-Level Waterproof Performance: Has a waterproof rating of IPX6, with a waterproof ring installed at the lens. It can work normally even in heavy rain, resisting various harsh outdoor environments and adapting to complex riding scenarios such as rainy days and humid conditions, ensuring stable operation of the light. Wide Floodlight Angle and Clear Field of View: The floodlight angle reaches 125°, which can greatly expand the illumination range and reduce riding blind spots. The front light beam has an irradiation distance of over 200 meters. Combined with the wide floodlight angle, it provides sufficient and broad field of view for nighttime riding, enhancing riding safety. Flexible Installation and Portable Adjustment: Supports three installation methods—it can be installed above the handlebar, below the handlebar, and also adapted for helmet installation (requires a corresponding bracket). The included H07P bracket supports 360° rotation, allowing adjustment of the beam angle according to riding needs to fit different heights, riding postures, and road conditions. The net weight of the product is approximately 230 grams (excluding the bracket), which is overall lightweight and will not add excessive burden to riding or the helmet. Durable Material and Safety Design: The lamp body is made of full aluminum alloy, featuring high texture and strong wear resistance, extending the product's service life. It has a built-in overheat protection circuit to prevent component damage caused by high temperatures and ensure stable operation of the light. It is designed with side lights to improve lateral visibility during riding, making it easier for surrounding vehicles and pedestrians to spot the rider and further enhancing safety protection. It is equipped with a wired remote switch, allowing operation of the front light without taking hands off the handlebar (rear light control is not supported), making mode switching more convenient and safe during riding. Clear Battery Level and Charging Indication: The battery level is indicated by the color of the button indicator light, with different displays corresponding to 61%-100%, 21%-60%, and 1%-20% battery levels. During charging, the indicators of the two switch buttons flash red; when fully charged, the button indicators turn to steady blue. During charging, the front light can be used in 400-lumen medium brightness mode and all modes of the rear light, but the intelligent working mode cannot be activated. Additionally, the light will be turned off by default when charging in intelligent mode. II. Detailed Specifications (I) Basic Information The model is V20D-1700, the brand is GACIRON, and the product type is a 2-in-1 bicycle road front and rear light, suitable for road riding scenarios. The product SKU is GACIRON V20D-1700 Light--A001010, with an overall weight of 590 grams including the bracket and a net weight of approximately 230 grams excluding the bracket. (II) Light Source and Brightness The light source uses 2 LEDs (including Cree XML2-U3 model). The front light has a maximum brightness of 1600 lumens, and the rear light has a maximum brightness of 100 lumens. When the front and rear lights are turned on simultaneously (1600 lumens for front light + 100 lumens white light for rear light), the combined maximum brightness is 1700 lumens. The floodlight angle is 125°, and the beam irradiation distance is ＞200 meters. (III) Battery and Charging The battery type is 2 rechargeable 18650 lithium batteries, with a total capacity of 5000mAh. The charging input specification is Micro 5V/2A, and the charging time is approximately 3 hours. It supports charging via devices such as adapters, laptops, and power banks, with strong charging compatibility. (IV) Battery Life (Reference Value) Battery life of the rear light in different modes: approximately 9 hours and 40 minutes for 100-lumen white constant brightness, about 78 hours for 5-lumen white flash, around 54 hours for 100-lumen red constant brightness, and roughly 85 hours for 5-lumen red flash. The front light has a battery life of over 16 hours in 200-lumen low flash mode, and the battery life in 400-lumen medium brightness mode is suitable for daily use—specific duration varies with different brightness modes. When the front and rear lights are turned on simultaneously at high brightness (1600 lumens for front light + 100 lumens white light for rear light), the battery life changes dynamically according to actual power consumption. (V) Protection and Material The waterproof rating is IPX6, with a lens waterproof ring. The lamp body is made of full aluminum alloy, and the bracket is made of durable material, supporting large-diameter installation. It has a built-in overheat protection circuit, providing high-temperature protection. (VI) Dimension Specifications The product dimensions are 105mm × 53mm × 33mm, which is compact and small overall, fitting the installation space of most bicycle handlebars and helmets. (VII) Additional Functions and Accessories It supports a wired remote switch (only for front light control), enabling convenient switching of front light modes. The package includes the V20D-1700 lamp body, H07P bracket, Micro USB charging cable, wired remote switch, and user manual in both English and Chinese, allowing installation and use immediately after unpacking.