Protect your garden from cat damage & fouling, & protect fish ponds, birds & other garden wildlife! Fully automatic, easy to install, the infra red detector monitors a 98 fan shaped zone up to 12m (39'3) & on detection of movement or body heat emits a two second burst of ultrasound. It effectively deters cats (without harming them), yet has no effect on birds, & other small animals, & is inaudible to humans. The weather proof case measures width 10.8cm (4) x height 18.7cm (7) x depth 10.3cm (4). The mains adaptor is 2 metres in length attached to the plug, it also comes with 1 5 metre extension.