Description: * The IPX-4 daily waterproof rating can be used even in rainy days, extending battery life and providing better daytime visibility. * This bicycle tail light has seven flash modes,which can be safely illuminated during the day and night.The flash mode can be changed freely,always on,fast flash,reverse flash,slow flash,clockwise, change flash,The windmill flashes. * Porous belt, which can change with the size of the seatpost,suitable for road bikes or mountain bikes,hybrid or commuter bikes,etc. * Easy to install and use, increase night riding safety. * We strictly guarantee the quality of products and provide excellent after-sales service. Specification: Condition: 100% brand newItem type: Bike TaillightMaterial: PC plastic + rubberProduct Color: black Light color: colorful Weight: Approx. 60g Light Luminous flux: 40 lm Waterproof level: daily waterproof Battery type: polymer lithium battery Battery capacity: 500mAh lithium battery Flash mode: 7 types Switch machine: long press the red button switch on the back Package List: 1 x Taillight1 x Taillight card buckle1 x Taillight fixing belt1 x Data cable