New USB Siren Alarm Laptop Monitor Anti Lost Alarm

Specification:

Using method:

- Open the battery board,distinguish anode and cathode. put into 3 batteries of AA 1.5V( in order to prolong the life of the products, suggest to use alkaline batteries) abd then cover the board
- Stick the sensor detector on the productd, pu t the switch on to "on", it sets up the defence. if some one cut down the line,prize up the sensor detector or combine the lead, it will warn
- When the volume becomes low obviously, pls change the battery immediately. if you do not use it in a long time,pls take off the battery.

Pictures: