This bike light features high brightness and 6 lighting modes to keep you visible and safe when you&#39;re riding at night. <Br/>features:<br/>cycling headlight maximizes 400lm brightness,which offers 6 lighting modes,including high,medium,low,fast flash,slow flash and sos mode.<Br/>with light sensing function,which automatically turn on/off according to the surrounding environment. <Br/>three-level power display,2200mah built-in battery recharges from your power bank,plug or any device with a usb port.<Br/>durable plastic construction and ip65 water resistant.But don&#39;t soak them into water.<Br/>convenient detachable design and easy to install on your bike handlebar(20-30mm/0.79-1.18In).<Br/>can be mounted almost anywhere,like stroller,skateboard,wheelchair,motorcycle,trike or scooter etc.<Br/>specification:<br/>material: engineering plastic<br />suitable : for 20-30mm/0.79-1.18In bike handlebar<br/>light size: 109*32*41mm/4.3*1.3*1.6In<br/>package weight: approx. 195.2G/6.9Oz<br/>package list:<br/>1* bike light<br/>1* usb cable