1. Made of high quality metal that is anti-corrosion, wear resistance, solid and durable for long time use.
2. Loud alarm can effectively scare thieves away, can also be used as SOS emergency alarm.
3. Vibrating sensor system, when the bicycle shake or vibrate, the alarm will release ultra-strong alert sounds for about 20 seconds, good bicycle security anti-theft tool.
4. 9V battery power supply, can last a week for normal usage, when the alarm sound weaker than normal alarm sound, you'd better to replace the battery, please take out the battery if long time no use.
5. Mini appearance, it's convenient to carry anywhere you are heading to. Press the red 'A' button to enter armed state, one 'DU' sound indicate you, press the gray 'B' button to quit the armed state, double 'DU' sounds indicating.
6. Easy to operate, remote control distance can reach up to 0m, open surroundings will be better, sometimes reach up to 30m.
7. Specially designed for bike, install it to keep your bike safety.
8. Recommend use alkaline 9V battery. If in cold winter recommend use cold resistance battery. Please replace batter once the alarm sound lower.