Intelligent Brake Light Descriptions Main Feature: Automatic acceleration and deceleration brake light When the car body accelerates or decelerates and brakes, the car lights automatically sense the speed change, and the LED lights will all light up and flash to remind other following riders Auto-sensing direction indicator When the vehicle body turns to the left, the LED lights automatically sense the steering, and the LED lights display a left arrow indication. When the vehicle body turns right, the LED displays a right arrow indicator. Personalized and creative LED display pattern A variety of cool and creative LED display patterns, bringing more wind and safety to riding Infrared safety warning line Significant warning, refusal to rear-end collision, safe steering, high recognition at night USB data interface Extended service life Silicone buttons Full sense of buttons Super dazzling infrared Outdoor safe riding Ductile slab Strong flexibility, excellent quality Never waste your money on batteries again. Built-in 1200mAh Li-ion battery, and its recharging time is about 3.5 hours The infrared ray light has high visibility, and its wavelength is 400 - 750nm Replaceable backside strap Perfect for improving your safety when riding a bicycle in the dark It is powered through the micro USB interface Specification General Type: Tail Light Material: ABS Placement: Saddle Tube Suitable for: Mountain Bicycle,Road Bike,Touring Bicycle Features: Easy to Install Power Supply: Li-ion Battery Parameters LED Quantity: 64 Working Time: 8 Dimensions and Weight Product weight: 0.1000 kg Package weight: 0.1500 kg Product size (L x W x H): 7.10 x 5.80 x 3.00 cm / 2.8 x 2.28 x 1.18 inches Package size (L x W x H): 8.00 x 7.00 x 4.00 cm / 3.15 x 2.76 x 1.57 inches Package Contents Package Contents: 1 x Bike Light