IPX6 WATERPROOF AND WIDE COMPATIBILITY. IPX6 waterproof, can withstand all kinds of bad weather or through puddles without worry. Compatible with most mountain bikes, off-road bikes or dirt bikes. Buy with confidence, please feel free to contact us if you have any questions/problems, we will reply you within 24 hours. USB RECHARGEABLE AND LONG LIFESPAN. Comes with 1 split 4 USB charging cable, charge 4 lights together with any USB device, charging for 3 hours for 9 hours of endurance (depending on light mode), never worry about running out of battery. Long lifespan up to 50,000 hours. SPLIT OR TWO IN ONE INSTALLATION. Comes with 4 turn signals. Special design for two-way installation, the bike taillight can be installed in one place such as under the seat post, or install the two bike turn signals separately on two sides of the bike bracket. Ultra-easy to install and use, no tools required. 5 LIGHT MODES AND EXCLUSIVE FUNCTIONS. The bicycle taillights with wireless remote control are built with 5 light modes and can be changed to left turn signal, right turn signal, constant yellow light, flashing yellow light and constant red light. Buy a bike taillight with turn signals that covers everything you need for a bike light! HIGH BRIGHTNESS AND GUARANTEES SAFETY. The LED bike taillight uses high-quality LED light beads to achieve an amazing brightness of 120 lumens and supports high visibility from 50-100 meters, warning pedestrians and vehicles around at night or rainy days to ensure safety.