1.Multiple Light Modes: The mini bicycle tail light has 4 light modes to choose from: flash mode(30H), breathing mode(30H), strobe mode(30H) and steady mode(12H). It enhances riding and fun at the same time, making you stand out from the crowd. In steady mode, long press the power button has 3 adjustable brightness levels: high (8-16H), medium (12-24H) and low (18-36H) 2.Built-in Intelligent Vibration & Light Sensors: Our mini bike rear light auto-off when there is enough light, auto-on in darkness, auto-off after the bike has been stationary for 30s, and auto-on when it senses a vibration (suitable for flash and breathing mode) 3.Precise Intelligent Brake Sensing:The bike brake light will reach the highest brightness when braking is sensed, high brightness for 3s, which has a better warning effect to improve riding . Suitable for mountain bikes, road bikes, e-bike(suitable for all modes) 4.High Visibility LED: The bicycle rear light is equipped with optical lens lampshade and 20pcs high lumen COB LED lamp beads, anti-glare and non-glare, high visibility, longer warning distance and higher coefficient. 3 levels of adjustable brightness 5.IPX6 & USB Rechargeable: The bike rear light has a built-in 300 mAh lithium battery with up to 30 hours of battery life. Omni-directional waterproof structure, resistant to high and low temperatures, rain and snow, easy to face 6. And : Sturdy aluminum alloy body, anti-drop and wear-resistant, simple and stylish appearance. Compact size of the host, weighing only 33g, equivalent to the weight of 6 sheets of A4 paper