ROCKBROS Bicycle Tail Smart 5 Lighting Tail Brightness Battery Level Aluminum IPX6 Easy for Road Cross and Cycling Light, Auto-On, Brake-Sensing,

[Brake Warning & Automatic Lighting] This bicycle tail light is equipped with a highly sensitive brake warning function that automatically lights up at maximum brightness for three seconds when it detects braking while riding, alerting vehicles behind you. This greatly improves safety. (It works in all lighting modes, day or night.) It also has brightness and vibration detection functions. Brightness detection: The light detects brightness and automatically turns off during the day (in bright areas) and turns on automatically when approaching a dark area. Vibration detection: The light automatically turns off if the bike remains stationary for 30 seconds. It turns back on when vibration is detected. (Double-click the power button to switch between automatic mode (default) and manual mode. Only automatic mode has brightness and vibration detection functions.) [Five Lighting Modes & Brightness Adjustment] Equipped with five lighting modes! Short press the center button on the taillight to cycle through the following modes: flashing (approx. 20 hours), breathing flashing (approx. 17 hours), rapid flashing (approx. 18 hours), fast flashing (approx. 25 hours), and steady on (approx. 9 hours). It also features brightness adjustment. In steady on mode, press and hold the button for 4-5 seconds to select three brightness levels: high, medium, or low. It has a memory function, so it will resume from the last mode/brightness saved upon reboot. The high-brightness COB LED lamp and innovative optical lens provide a bright yet subtle light source, preventing dazzling and disturbing passersby. The turbo lens design also provides a 260-degree wide beam for excellent visibility. (Press and hold the power button for 1 second to turn the power on/off.) [TYPE-C Rechargeable & Battery Level Indicator] The rear light features a built-in 3.7V/250mAh battery that can be recharged repeatedly via TYPE-C, eliminating the need for batteries. It's convenient and can be used with mobile devices, USB ports, smartphone plugs, etc. It also features a battery level indicator (around the power button) that lets you see the remaining battery level at a glance. When the indicator flashes blue rapidly, it indicates low battery and needs to be charged. This visual notification lets you know when it's time to charge. While charging, the indicator flashes blue. When fully charged, the indicator remains steadily lit blue. (The indicator will automatically turn off after one hour if the charging cable is not unplugged.) Charging time: Approximately 2 hours. High-quality aluminum alloy construction and IPX6 waterproofing: The luxurious CNC aluminum alloy body is drop-resistant, heat-resistant, durable, and corrosion-resistant, providing excellent protection against drops and abrasions, extending the lifespan of your bicycle taillight. IPX6 waterproof technology ensures it can withstand sudden rain and splashes from puddles, making it a reliable taillight for any weather or bumpy roads. (Do not immerse in water.) [Easy Installation & Product Specifications] There are two installation methods: saddle rail or seat post, so you can choose the one that best suits your needs. (Mount and tools for installation are included.) The safety light measures approximately 30*28*28mm and weighs just 34g (including mount). This compact accessory is a must-have for road bike owners looking to reduce weight. It is compatible with most bikes, including road bikes, mountain bikes, cross bikes, and folding bikes. We offer a 6-month warranty, so if you have any issues with the product, please feel free to contact us. We offer refunds, returns, and exchanges. Product Description: *Brand: ROCKBROS *Product name: Bicycle tail light *Material: LED lamp + PC optical lens + aluminum alloy *Color: Black *Weight: Approx. 34g (including mount) *Size: Approx. 30*28*28mm Features: High quality, automatic lighting, smart brake response, Type-C rechargeable, 5 lighting modes, brightness adjustment, battery level indicator, aluminum alloy, IPX6 waterproof, lightweight, easy installation *Applicable to most bikes, including road bikes, MTBs, cross bikes, and folding bikes.