G Keni Smart Anti-Theft Bike Alarm, Bike Tail Light Rechargeable, Warning Product Features [ 4 LIGHT MODES ADJUSTABLE BRIGHTNESS ] This bike alarm tail light have 4 light modes, Normal Flash/Breathing Flash/Fast Flash/Steady On, you can change any modes that you like with the remote control or just press the button on the bike tail light to switch the modes.The brightness is adjustable, in the steady on mode, just long press the button to adjust the brightness that you need. [ ANTI-THEFT ALARM BIKE TAIL LIGHT ] The cycling security alarm can make a loud sound(105~115 decibels) to draw people's attention and deter the thieves. Distance in the open, the remote control operating distance up to 50m(164 feet), easily find your bike location through light or sound. pls note, it does not contains a GPS tracker. [ SMART BRAKE SENSING ] Designed with the brake sensor, Automatic ultra-bright brake light will automatically light up after braking. The bicycle light is super bright and highly visible from a distance, really catch attention to enhance your safety. The brake sensor function works on all the light modes. [ AUTO ON/OFF for BATTERY SAVING ] This Smart bike tail light including Motion Sensor and Light Sensor, it will be auto off when detect in no motion after 30 secs. Once touch it or detect the bike is moving, the light will auto on again. Also when you ride under the sunlight, the tailight will be auto off due to the light sensor is working. IF YOU LIKE TO RIDE IN THE DAYTIME AND NEED THE TAILLIGHT KEEP WORKING ALL THE TIME, please choose the mode 3 and mode 4 to avoid Light Sensor working. [ OTHER FEATURES WARRANTY ] 1, USB rechargeable. 2, 800mAh Super long battery life. 3, fast install. 4, High lumen brightness. 5, IPX5 Waterproof. And we offer ONE YEAR WARRANTY, If you have any questions or problems, feel free to contact us at any time. We will help you to solve the problems or reship a new one for you. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!