【Wireless Security】This motorcycle anti-theft alarm system offers wireless protection for motorcycles, electric bikes, and bicycles without complex wiring installation. 【Loud Deterrent】Featuring a powerful 110dB alarm, this model produces a louder volume than standard versions, effectively deterring potential thieves. 【Weather-Resistant Design】With an IP65 waterproof rating, this alarm system is suitable for outdoor use in various weather conditions. 【Rechargeable & Long-lasting】The alarm unit is equipped with a built-in 4.2V 700mAh lithium battery, rechargeable via USB-C for convenience and extended use. 【Remote Control Operation】Includes a remote control for easy arming and disarming of the system. 【Multi-Device Compatibility】One alarm unit can be paired with up to three remote controls, allowing for flexible use among family members or multiple vehicles. Specifications: Alarm Volume: 110dB Waterproof Rating: IP65 Charging Method: USB-C Working Frequency: 433.92MHz Wireless Range: 0-229ft Alarm Unit Battery: 4.2V 700mAh Lithium Battery (included) Remote Control Battery: 12V/27A Alkaline Battery (included) Note: Please charge the device before first use. It can be used normally after activation. It is recommended to fully charge the device before use again.