Ⅰ. USB Rechargeable, No Need to Change the Battery - The bike alarm is powered by a built-in rechargeable 4.2V 700mAh lithium battery, which can be powered by a DC5V power adapter, the package includes a USB-C charging cable, no need to change the battery. The bike alarm adopts version 4 energy-saving technology and can work for 1-3 months on a full charge (depending on the alarm frequency). Ⅱ. 3 Mounting Methods for More Use - Comes with mounting brackets and double-sided tape, 3 mounting methods. Bracket installation is more convenient to change the installation position. Built-in zippers and double-sided tape, suitable for irregular installation items. Easy to install and use. Ⅲ. A bicycle, e-bike or motorcycle must have an anti-theft alarm. Loud alarms up to 110 decibels effectively scare away potential thieves. The bicycle siren is made to work. 3 levels of adjustable volume. 7 levels of adjustable sensitivity, from light touch to click or tap, adjust according to your needs. Ⅳ. Remote control - remote wireless control, upgraded remote control, wireless range up to 164-260 feet. Vehicle search function, easy to find your car in the parking lot, 3 kinds of ringtones. Ⅴ. IP54 waterproof, suitable for outdoor use. Vibration triggered alarm, anti-theft product for bicycles, e-bikes, motorcycles, mopeds, trailers, luggage, doors and windows... Ⅵ. More Features: Charging level indicator / Low battery indicator / Long battery life / More alarms and remote controls (Note: This alarm set is not compatible with B0734QN8KR/B01HUSRP7RP7RP7RP70. Ⅶ. Color: Black Material: Plastic Ⅷ. Package Contents: 1 x Bicycle Alarm (including battery) 1 x Remote control (with battery) 1 x USB Type-C cable (charging adapter not included) 1 x Mounting bracket accessories 1 x No-mats 2 x Cable tie. The above package contents only, other products are not included. Ⅸ. Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. differ from the actual measurement error is +/- 1-3cm.