5-IN-1 SMART BIKE REAR LIGHT FOR CARGO RACK - With electric bike horn, anti theft vibration alarm, rear bike light, bike turn signals, automatic bicycle brake light 5 functions. It ensures your safety when riding, especially for night riding. Then arm it by alarm function and take remote off after riding to prevent theft and provide additional security for your bike. 5 functions allow you to save more space on your bike and save money. An affordable & practical bike accessoriesULTRA-BRIGHT BICYCLE REAR LIGHT WITH 6 MODES - Super bright and extra-wide bike taillights with 31 high-end LED lights, up to 160 lumens of powerful flashes alert motorists at night and during the day, that enhance your visibility and safety. Slow Flashing/Breathing/Fast Blinking/Steady Light/Emergency Light/OFF, 6 light modes easily selected by remoteBIKE TURN SIGNALS - Easily press the R/L button of remote which clamps to handlebar before you turning, and right /left turn signal lights flash with click sound just like in car. Other drivers and pedestrians will see you and know exactly which direction youll ride. Never forget to turn off the blinker againSMART BIKE BRAKE LIGHT - Built-in auto sensor. Automatically highlights the rear light for 2 seconds when braking to alert drivers behind you, effectively preventing rear-end collisions and traffic accidents. Note: This feature is not available in emergency modesANTITHEFT VIBRATION ALARM - Anti-theft bicycle alarm activated by vibrations, effectively deterring thieves and providing extra security when parking outdoors. There are 7 levels of sensitivity to choose from. You can easily adjust the sensitivity of the alarm from gentle touch to push or beatBIKE HORN - Equipped with an electric bicycle horn function that emits a loud 110-decibel sound when the remote button is pressed, notifying cars, pedestrians, and other drivers of your presence. 3 adjustable volume levels, 3 horn sounds for your choice, electric car horn sound/horn sound /birdcall soundSMART AUTO ON/OFF - The tail light is designed to automatically turn on and off based on the surrounding conditions. Only in Slow Flashing and Breathing modes. The taillight turns off after 30 seconds of inactivity in dark environments (Indoor environment is dark environment, no matter if your home light is turned on or off), and turns on when motion is detected. In bright environments, it automatically turns off to save power. No worry the bike taillight auto lights up when you sleep at night