Lightweight Bicycle Horn Loud Electric Siren Alarm Cycling Bike Alarm Computer Electronic Horn

Features: A dual-purpose machine can be a powerful horn or a careful warning alarm. Loud alarm: Up to 110 decibel. One key control: Through a wire connects a key and the alarm. Surveillance control: Password can be set to avoid being stole and increase securoty surveillance, safe and reliable. Vibration alarm: Enhance the sound power and security surveillance. Password is changeable according to user manual so that the alarm can be more reliable. Rain resistance, splash resistance. Powered up by four button batteries(included). Discounted at only: US$ 5.18