Super Bright Tail Light - These safety lights will keep you safe. 240 degree wide angle visual design provides super bright light and increased visibility. Keeping you visible not only at night but also in the day IPX4 Waterproof - The rear lights are protected by the specially designed high density waterproof plastic lamp body. You can use it in any weather, extremely durable USB Rechargeable - Powered via USB cable. Compatible with computers, power banks, and other devices with USB output. It will save you lots of money on batteries 4 Lighting Modes - One key to select different lighting modes among Steady Light, Slow Flash, Fast Flash, Repeating Flash. The slow flash is ideal for foggy mornings and the fast flash is suitable for the night Easy to Use - Clip on your belt, reflective vest, backpack, dog collars, harness or anywhere where on your clothes. Install on your bike, helmet, scooter, stroller, wheelchair or anywhere you can imagine Package Content: Bike Taillights*2 Warm Advice: Dear buyer, due to lighting effect, monitor's brightness, manual measurement etc, there may be some slight differences in the color and size between the photo and the actual product. Sincerely hope you can understand! Thank you!