Key features

• •▶Novel Design -- It's moderately loud--certainly loud enough to scare off a burglar.You can treat as gifts to friends or your parents.
• •▶Easy to Install -- Lightweight, compact design, safe and durable,easy to operation,anyone can quickly install it. The mount is easy to install onto a standard bike handlebar and have it secured to the point it won't move.
• •▶Great Practical -- To activate the alarm, you just hold down the "0" button for a few seconds. After that, if there is even a slight movement, the siren will sound alarm.
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• •This device is simple to install.
• •It's moderately loud--certainly loud enough to scare off a burglar.
• •Mounting-Pipe Diameter: Approx. 2.5cm
• •Default Password: 0000
• •Power Supply: 4 X AG13 Button Battery (includes)
• •Material: Plastic
• •Size: 4.4*4.5*5.1 cm
• •Color: Black
• •1 X Bicycle Horn (with Builted-in Battery)
• •1 X User manual