Features:Made of high quality metal that is anti-corrosion, wear resistance, solid and durable for long time use.Vibrating sensor system, when the bicycle shake or vibrate, the alarm will release ultra strong alert sounds for about 15 seconds, good bicycle security anti-theft tool.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.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. Easy to operate, remote control distance can reach up to 10m, open surroundings will be better, sometimes reach up to 30m.Specially designed for bike, install it to keep your bike safety.Specification:Condition: Brand NewItem Type: Bicycle Anti-Theft AlarmMaterial: ABSPower Supply: 9V Battery(Not Included)Sensor Type: Vibrating SensorAlarm Volume: 110dBSize: Approx. 9.8 x 6cm/3.9 x 2.4inch(L x W)Package Weight: Approx. 110gPackage list:1 x Bike Lock (Battery Not Included)1 x Remote Control(Built in battery)1 x Manual1 x Screws Pack.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.