This bicycle warning light is a necessary tool for you when you biking on the road.<br> Red or White light brighting from this item can be easily seen by other drivers or Passers-by far away.<br> Red light is the best warm color using in frog envrionment. With this lamp, you'll be safer when biking at day and night.<br> Specifications:<br> 240wide light angle, can be view easily by other car drivers.<br> fix it on your front support baryou will also warning Passers-by<br> Quick and easy installation, waterproof.<br> Steady about 50 hours, flash about 150 hours.<br> Modes: Fast flashing, Slowly flashing, Steady<br> Material: Aluminum alloy+silicone<br> Powered by: 2 x CR2032 battery (Included)<br> Suitable for tube diameter: 20-40mm<br> Package Included:<br> 1 x Bicycle LED Rear Light<br> 2 x CR2032 20*2MM 3V Battery<br> Notes:<br> For long time battery consume, light may not turn on ,if this happen,you can change two battery to turn it on