Traditional chains, padlocks and U Locks only do half a job and can be pretty easily removed by those who know how, but even the sight of this alarm will have even the most determined of thieves thinking twice.If your bike is moved, the alarm will spring into action and give off an ear-shattering shriek for 15 seconds. No thief will want to hang around when this alarm goes off. 3 sensitivity levels allow you to determine how much movement is needed to trigger the alarm. When triggered alarm had already sounded for 5 times, If triggered again within 5 seconds , it will sound continuously for 15 seconds. I'm sure so powerful function must can protect your bicycle effectively.

Features:

4 digital code,only the user can unlock.
Adopt micro-computer technique,have Hight-Middle-Lower sensitivity choose.
Quiver trigged,security and sevsitivity.
Low power consumption to allow the battery a long life.
Easy to installation and DIY.

Material: Sturdy plastic
Color:Black, Red
(Plz Leave a Message and Tell Us Which Color You Want From Those We Provide, Otherwise We Will Send Out According to Our Inventory)
Fit for: Bicycle
Power supply: 1 x 6F22 9V battery (Not include)
Dynamic current < 100mA
Alarm decibel > 105db
Work temperature: -15℃ ~+75℃
Store temperature: -40℃~+85℃
Environment humidity level: 5%-98%

Usage:

Default code " ABCA"
Code Change. When unit not work.
Press 'A' for 3 seconds and you will heart a short ' Di' sound, input old code, you will heart a 'DiDiDi' sound if correct. Then you should input your 4 digital now code not later than 5 seconds, you will heart a 'DiDiDi' sould if success. Neight you input the wrong old code or failded to change the code, you will heart long 'Di' sound. Then you should repeat the process.
If take out the battery excced 30s. it will go back default code automatic.
Default sensitivity: middle
Sensitivity adjust. When the unit not work, press " C " and hold on until you hear( you should loose your hands after you hear each sound): Di=High sensitivity; DiDi=middle sensitivity ; DiDiDi=low sensitivity

Set alarm. Press " B " for 3 seconds, you will hear a ";Di" sound then the unit will work after 5 seconds delay.
Relieve alarm. Input your 4 digital code then you will hear a " DiDiDi" sound if correct. If input wrong code, you will hear a long "Di" sound.
The key pad will be locked for 3 minutes if you input the wrong code 4 times in succession, and will resume 3 minutes later.
When triggered alarm had already sounded for 5 times, If triggered again within 5 seconds , it will sound continuously for 15 seconds. I'm sure so powerful function must can protect your bicycle effectively.

Package Listing: