SQDeal Rechargeable USB Waterproof Bright Bicycle 5 LED 4 Mode Red Front Tail Warning Light Bike Cycling Safety Rear Flashing Alarm Lamp Install or remove without any tools, easy to be fixed on seat post ,frame or tail of bike Secure, remains securely locked in position, even during off-road use. It is water and shock resistant. Super bright led light makes you visible on the road in dark. Suitable for the professional or casual bicycle rider.