It is home security, looking slim . In fact it is very light.And it has tow functions : shock-control and magnetic-control.If someone breaks the glass , shock-control function will work and it sounds, and if he pulls window secretly, when the distance arrives at about 5 cm, and it will alarm. So it's easy to use. Size: 118mm(length)x35mm(width)x8mm(height) Weight:30g Temperature scope: -10f¦-- 40 f¦
