The LED bicycle taillights use high brightness COB light beads, eye-catching flood warning, and uniform light that can be clearly seen even in low light conditions, with strong penetration. Ensure maximum visibility and safety during nighttime cycling. You can choose between stable, flashing, and pulsating lighting modes, and quickly switch with one button to adapt to different riding conditions. Unlike traditional flashing taillights, the light flows like photons, softer and more beautiful. Rechargeable, long battery life. Bicycle lights are convenient and cost-effective, with a 300mAh battery and Type-C portable charging that can be connected to a computer or a portable power bank for charging. After being fully charged, it can work continuously for 5 hours. The full charging time is about 40 minutes. Efficient power management system, long battery life, uninterrupted use during your cycling adventure. Waterproof and easy to install with rubber strap, tool free installation, fast installation, suitable for most pillar diameters. Waterproof every day, not afraid of rainy days. be careful! Unable to withstand heavy rain and soaking! The perfect bicycle companion size: 3.31 * 2.76 * 0.71 inches. Excellent LED technology ensures long-lasting performance, while its lightweight design does not make you feel heavy. This reliable and efficient LED bicycle light can enhance your road safety.