?This is 8 Channel Laptop Notebook USB Anti-Theft Alarm Security System. It has high quality and durable to use£¬ good choice for you!                                    Features            New and high quality<br>USB Anti-Theft Alarm Security Systerm for PC / Notebook / Laptop<br>Alarm when the USB wire is disconnected to protect your laptop from being stolen<br>With On/Off Switch£¬ easy operation<br>Loud alarm scares potential thieves away<br>Power Supply: DC 9V<br>Dimension: 5.31" x 1.18" x 6.69" (L x W x H)<br>Color: Black<br>                                                                                                Package Includes            1 x 8 Channel Laptop Notebook USB Anti-Theft Alarm Security System<br>8 x USB cable<br>