Feature 1Using high sensitivity deployment of the probe, high sensitivity 2Standby power consumption as low as the micro-level, the battery used for a long time 3Easy, effective and convenient to install 4Use the password fortification, only the owner can lift the state of arming 5Resettable 4-digit code that you can reset the combination as often as you like, offers more security for your bikeSpecification Lightweight and compact size to store or carry. Resettable 4-digit code that you can reset the combination as often as you like, offers more security for your bike. What are you waiting for? Features: 1. Using high sensitivity deployment of the probe, high sensitivity. 2. Standby power consumption as low as the micro-level, the battery used for a long time. 3. Easy, effective and convenient to install. 4. Use the password fortification, only the owner can lift the state of arming. 5. Resettable 4-digit code that you can reset the combination as often as you like, offers more security for your bike. Password settings and changes: 1. The default password for the product factory is:ABCA, in the non-armed state, the user can press. 2. The following method changes to your own password: long press A key for about 3 seconds, hear thedrop of the sound, enter the old password, if the password is correct, will hear thedrop three prompts correct, it is needed in 5 seconds to start entering four new passwords, if the change is successful, will hear thedrop three voice prompts. If you enter the old password error or modify the new password is unsuccessful, then the long sound back secret code to modify the state, then the need for the new operation. 3. If remove the battery for about 30 seconds, the system automatically restore the factory default password:ABCA. Sensitivity adjustment: Product factory set the sensitivity for the mid-range, in the non-armed state, long press C key to heardrop prompts to set the sensitivity tohigh, press and hold the C key again to hear thedrop two tips set sensitivity for themiddle, press and hold the C key again to hear thedrop three tips to set the sensitivity tolow, continue to press the C key will cycle the above settings operation. Arming: Hold down the B button for about 3 seconds, hear thedrop of a prompt to enter the arming state, 5 seconds after the start of alert. Unarmed: In the arming state, enter the correct four-digit password, you can lift the deployment, then you can hear thedrop three prompts, if the password is wrong, then a long tone prompts to enter the wrong. In any state, enter the wrong password four times in succession, the system will lock the keyboard, then any operation will be invalid, automatically unlock after 3 minutes.In the arming state, the anti-theft device to feel the vibration issued a short alarm 5 times, if again within 5 seconds by vibration, the continuous alarm sound 15 seconds. Specifications: Material: ABS Color: Black Package Weight: approx. 88g Size: approx. 9.5 x 6.5 x 3.7cm / 3.74 x 2.55 x 1.45 Battery: 1 x 9V 6F22 battery (not included) Working Current: 105db Operating Temperature: -15-75 Storage Temperature: -40-85 Environment Humidity: 5%-98% Package Included: 1 x bike code lock 4 x screws 2 x nuts Note: 1. The correct installation of this product is waterproof, but not immersed in water. 2. It is recommended to use 9V alkaline. In some cold areas of winter, please use the cold good performance battery, replace the new battery when the alarm volume is reduced. 3. When not in use for a long time, remove the battery to avoid damage to the product due to battery leakage.