LOUD & ADJUSTABLE VOLUME?The volume of the bike alarm up to 115dB, effectively repelling malicious thieves.The volume can be adjustable which meets your daily need.The bicycle alarm has 5 kinds of ringtones to set when it is not in the armed states.(Details follow the instructions) REMOTE CONTROL:Wireless control by remote, strong wireless range up to 262ft. The Sound even can penetrate through walls. Vehicle search function, easy to find your vehicles in parking lot. GREAT BATTERY DEVICE:The bike alarm with remote equipped with a 400mAh lithium battery, which has a long battery life.The bicycle alarm system anti theft with type-c charger, only need 2 hours to charge MULTIPLE MODES:There are 4 buttons to choose on the remote: arming/disarming/panic alarm/bell. The arming use for 3 levels of vibration sensitivity adjustment. The usage of disarming is funtion setting.The vibration can be set personally from a low level to a high level. WATERPROOF & EASY INSTALL:In order to meet bad weather, we design the antitheft alarm systems with IPX5 waterproof so that our customer can use it even in rainy day.4*5*3cm(1.5*1.96*1.18inch)takes up no space, which is convenient to concealed installtion.