【3-in-1 Multifunctional Design】Combines a GPS/wireless cyclocomputer, powerful horn, and dual LED lights in one compact device, offering essential cycling equipment in a single unit. 【High-Capacity Battery】Equipped with a 4000mAh battery, ensuring long-lasting performance for extended rides without frequent recharging. 【Bright Dual LED Lights】Features dual LED lights with up to 800 lumens brightness, providing excellent visibility for night riding and low-light conditions. 【Versatile Lighting Modes】Offers multiple lighting options including single light, dual high beam, dual low beam, and flashing modes to adapt to various riding environments and preferences. 【Powerful Horn】Includes a 120dB horn with three selectable sounds, ensuring you can alert others effectively in different scenarios. 【Precise GPS Tracking】Utilizes GPS/wireless technology for accurate speed and distance tracking, providing crucial ride data for cyclists. 【User-Friendly Controls】Features dual-line control and button operation for easy and flexible management of all functions while riding. Specifications: Battery Capacity: 4000mAh Weight: Approximately 168g Brightness: 800 lumens Dimensions: 108 x 52 x 30mm Horn Volume: 120dB with 3 sound options Light Modes: Single light, dual high beam, dual low beam, flashing