[Smart Vibration Response Tail Light] Built-in intelligent vibration sensor. If the rear light of the bicycle does not feel any vibration, it will automatically turn off after three minutes to save energy. When vibration is detected, the tail light will automatically turn on again immediately. [Super Bright LED Bike Tail Light] Using high brightness LED chips. Produces a super brightness of 100 lumens. On foggy or rainy nights, the brightness is sufficient to be seen from a distance of 165 yards/150 meters (maximum). Make your cycling activities safer than ever. [Wireless Remote Control] Integrated turn signal function. By pressing the three buttons on the wireless remote, you can easily change the four lighting modes of the taillights and send a turn signal to the vehicle or the driver behind. Keep away from all kinds of potential danger or injury [USB rechargeable tail light] Built-in high quality lithium-ion battery, in enhanced red light mode, the tail light can provide up to 7 days × 2 hours of use. And the remote control can be used for 30 days on a single charge (calculated based on the lowest frequency of use). [Wide range of applications] It is especially suitable for all types of bikes: mountain bikes, road bikes, cross-country bikes and racing bikes. It can also be well installed on various helmets, skateboards, electric scooters and backpacks for warning purposes. Product Size: 16.8cm x 3.4cm. Package Quantity: 1 set.