Knight for Your Motorbike MysBiker Alarm Disc Lock is a practical solution for bikers to protect their beloved motorbikes or scooters while parking outside or at home.Made of high quality stainless steel case, guarantee high security and firmness for your mororbikeDurable and Waterproof Made in waterproof stainless steel case,the inner silicone rubber gaskets on the edge of the alarm device effectively keep out the rain or splash.With waterproof function,keep working in rainy days and never get rusty.Steps To Use: 1. Press the lock button to lock the disc brake,and you will hear the sound "beep". When the lock is vibrated, the lock will give off an alarm "beep beep beep" three times in case this is an accident.When vibrated again,Silver Knight will give off an continuous shril alarm for 10-12 seconds.And it keeps alarm with serial vibration. 2.Silver Knight will cost you 3-5 seconds to open the lock ,if the key does not match,it will give off an alarm. Use the right key to open the lock,the alarm will stop at once. Battery Replacement When the lock no longer make sharp alarms,instead produce constant sound "Ge Ge Ge…", that means the battery is going to be exhausted and you need to replace them. Please use the Mini Wrench we provided to spin out the fours screw at the bottom,take away the shell and replace the battery. Pay attention to the anode "+" and cathode "-".Product Specification: Size:3.5"x 2.7"x1.6" Material:High grade Alloy steel Battery:Zinc battery(6pc inside,6pc back up）What You Get: MysBiker Alarm Disc Lock*1 Mini Wrench *1 Lock Keys*3 Zinc batteries*12(6pc inside,6pc back up)