Electronic Bike Alarm MTB Chain Security Lock Motor Bicycle Anti-Theft Lock

Description: Easy to install on your seatpost, press a side button to take down. Sensitive alarm system with a loud 110DB sound secures your bike from theft. Durable alloy cylinder protects from erosion. With a seatpost bracket. Specification： Type: Alarm Chain Lock Material: Steel+PVC Length: 130cm Weight: 0.54g Package included： 1* Alarm clock set (with 2 keys and a seatpost bracket) Instructions 1.Open the lock: Insert the key into the lock body and turn 90 degree left. 2.Lock and Setting Alarm 1)Cut off Alarm Setting: Insert the lock cylinder to the lock, you will hear a "B" sound and locked. LED light fast flash 5 seconds turn to slow flash and the lock enter the cut off alert standby state. 2)Vibration Alarm Setting: Use the vibration Alarm Setting Tool insert the Vibration Alarm Setting Holes beside LED light, you will hear a "B" sound. The lock enters the vibration alert standby state. 3)When the lock was broken or the cable was cut off, the lock will alert loudly, last 30 seconds. And then turn to alert standby state again. 4)Insert the key into the lock body and turn 90 degree left, you can open the lock. 5)When the lock was opened, the alert will be stopped at once. 3.How to exchange the battery. (Use 2 AAA Batter,is NOT included) 1) Open the lock and pull out the lock cylinder. 2) Remove the screw and the battery cap. 3）Put the AAA battery in.( Included)