• 【Intelligent Light Control】Advanced light sensor automatically adjusts brightness based on environmental conditions - bright illumination in darkness, off when idle in low light.

• 【Brake Sensing Technology】High-density speed sensor enhances to bright red for 3 seconds when deceleration is detected, alerting rear traffic and improving rider safety.

• 【Bright LED Illumination】High-intensity LED bulbs penetrate the darkest nights, providing exceptional visibility and safety for night riders.

• 【Precise Battery Indicator】Features a percentage-based battery display, offering more accurate power readings compared to other taillights, so you always know when to charge.

• 【Automatic Sleep Mode】Supports auto-sleep functionality to conserve battery life when not in use.

• 【Multiple Lighting Modes】Six functional modes including steady, fast flash, breathing flash, slow flash, intermittent flash, and strong flash for versatile use.

Specifications:

• Model: BG-3149
• Material: ABS+PC
• Charging Method: USB 5V/1A
• Weight: ≈23g (without bracket)
• Installation: Seatpost / Seat Bow (Optional)
• Battery Capacity: 3.7V 500mAh
• Water Resistance: IPX6
• Dimensions: 32mm x 32mm x 34mm (light body)