5 LIGHT MODE OPTIONS - Can be used as turn signalturn right and left with 120dB sound turn signaland tail lightred light always on, red light flashing or all turn signal. You can change the different signaling modes according to your needs. VISIBLE FROM 100M DAY AND NIGHT - The turn signals and brake light for bicycles are visible up to 100 meters away. Visible from afar, you won't worry about taking the bike at night. IPX2 USB CHARGER - IPX2 waterproof function can withstand rainy days and humid climate, waterproof designed for outdoor cycling. this bike tail light is USB rechargeable, 4.5-25 hours working time in different modes after 3 hours charge. WIRELESS REMOTE CONTROL - Lights can be controlled by pressing the button correspondent of the remote control within a radius of 10 meters. Is equipped with a cr2032 battery (included) with an autonomy of more than 200 days. If you buy more than one rear light, one remote can also control more than one light at the same time. EASY TO INSTALL AND REMOVE - Adjustable Rubber Firmware for Bike Rear Light]. Each rechargeable bicycle tail light has adjustable four-hole wraparound rubber firmware, it fits almost all bicycles. You can put the rechargeable bicycle tail light anywhere else, such as helmet, stroller, pet chain, etc. Please note that due to manual measurements and differences in display, there may be slight differences between individual products and photos.