XIAOKOA Intelligent Bike Tail Light,Wireless Anti-Theft Bicycle Alarm,USB Rechargeable Taillights,Waterproof Rear Bike LED with Remote Control and Bell for Mountain Accessories 3 IN 1 Combination: This is a good combination of bright taillight + intelligent remote alarm + electric bell to protect your bike from theft. All operations by remote control to complete.Like cicada-like shape is very good hidden in the seat under the bracket.small and beautiful light, light weight and waterproof, so you wont worry if your bike are outdoor. Driving bell / COB light source: 120 db bell sound crisp and bright with COB bright light source to simultaneously alert the front and rear, designed to protect you and others safe.In addition to that any movement of the bike and it will have warning beeps,If continue to move the bike, it will issue a harsh alarm sound to scare the thieves. A key search / smart alarm: wireless remote control stable and accurate, car-level anti-theft system to complete a key control, for your bike to provide a full range of protection. USB charging / battery energy saving and durable: 2-3 hours of charging, standby more than 30 days, 15-20 days of normal work. A6 provide a long-term protection of your safety. One year product warranty service: all-weather to provide free customer service, the taillights enjoy one-year warranty, acessories replacement for free. XIAOKOA is committed to providing customers with the most complete security solutions. <span class="a-text-bold">Alarm Wireless Taillight</span>: Equipped with a remote control You can operate the remote control within 100m,easily find the location of own bike at night,remote control precise, crisp sound, warning passers. <span class="a-text-bold">Anti-Theft Taillights:</span>In the locked state, there is any vibration it will alarm, 120 dB harsh sound will remind the owner and scare the thief <span class="a-text-bold">Ulter-HighDecibelSiren</span>: The highest decibel up to 120 decibels, once the bicycle has a touch vibration, it will emit piercing alarm sound sharp enough to frighten and deter thieves. <span class="a-text-bold">Waterproof</span>: Small and waterproof tail light,rain can also be used normally. <span class="a-text-bold">Stand byforLongTime</span>: Charging time is spent 2-3 hours, for more than 30 days of standby / 15 to 20 days.The remote control battery normal use about 8-12 months.