Package include:1 * bike brake light (including battery)<br />100% brand new and high quality<br />When you brake， the light will turn on (without on/off switch button)<br />Details:<br />Condition: 100% Brand New<br />Item type: bike brake light<br />Perfect accessory for outdoor biking or hiking<br />With ultra brightness red LED light<br />Warning behind vehicles keep safe distance<br />On/off switch button: no<br />Water Resistant: waterproof design， circuit with special treatment， normal use on a rainy day<br />Battery: 1PCs of CR1025 battery (included)<br />Easy to install<br />Item weight: 5.5g