Bicycle Light ANTI-THEFT ALARM: The cycling security alarm emits a loud sound (115 dB) to attract attention and deter theft. In open areas, the remote control operates up to 50m (164 feet), allowing you to easily locate your bike using light or sound. SMART BRAKE SENSING & LIGHT PERCEPTION: Equipped with a brake sensor, the automatic ultra-bright brake light activates when braking. The bicycle light is highly visible from a distance, increasing visibility and safety. In low-light conditions, the taillight turns on automatically. After exiting a dark environment, if no vibration is detected, the taillight automatically powers off. MULTIFUNCTIONAL REAR BIKE LIGHT: Easy to install. Features a built-in alarm, COB LEDs, and a 200-degree wide-angle design, enhancing visibility for other road users during night or daytime riding. Designed to keep you safe in various conditions. Can also be used as a helmet light, backpack light, or warning light. IPX65 WATERPROOF & USB RECHARGEABLE: Rated IPX65 for water resistance, suitable for rainy conditions or splashing water. Built-in 800mAh polymer lithium battery with USB charging cable. Charges via computer, wall charger, power bank, or any USB-enabled device. After 3 hours of charging, the light operates for 2040 hours depending on mode: Slow Flash (40h), Breathing Flash (30h), Steady On (20h). Model: A8 Remote Control Battery: 12V/27A, Alkaline battery Color: Black Material: ABS+PC+Stainless Steel Size: Light 50x43x42mm; Remote Control 58x35x15mm Package Contents: 1 x Host + Taillight Bracket 1 x Remote Control 2 x Mounting Bracket 1 x Plastic Strap 1 x Square Gasket 1 x USB Charging Cable 2 x Installation Tools (Large + Small) 1 x Chinese and English Instructions Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 13cm.