USB RECHARGEABLE - The bicycle alarm is powered by a built-in rechargeable 4.2V 700mAh lithium battery which can be by your DC5V power adapter and the package included USB-C charging cable, so no need replace the battery and save money. 3 INSTALLATION METHODS SUITABLE - Come with mounting bracket, cable ties and double-sided tape for 3 installation methods. Bracket installation is more convenient to change the installation position. REMOTE CONTROL - Wireless control by remote, updated remote with strong wireless range up to 260 ft. Vehicle search function, easy to find your vehicles in parking lot. ADJUSTABLE VOLUME & ADJUSTBALE SENSITIVITY - Up to 110dB LOUD alarm, scare off potential thieves effectively .3 levels adjustable volume, don't worry about the alarm is extremely loud or not loud. 7 levels adjustable sensitivity from gently touch to push or beat, easy to set it as your need IP65 waterproof:suitable for outdoor use Product Name: Automobile Central Control Vibration Sound and Light Alarm Alarm loudness: Max120dB Remote control distance: 50 meters Charging: USB C Battery life: Remote control: 2 years; Alarm: More than 3 months Adaptation temperature: -40 to 70 Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Specifications:B: cover Color:Black Material:ABS Package Contents: 1 * Bicycle Burglar Taillight Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.