Gives peace of mind knowing dogs are safe and secure inside the garden. Includes a rechargeable receiver collar with eight levels of stimulation. Level 1 is a tone and vibration setting which is helpful for when training. Levels 2 to 8 are adjustable static stimulation so these can be set based on the dog's temperament. Comes with 152 metres of boundary wire which can secure up to a 1/3 acre garden. The transmitter has an LCD screen so you can see the boundary distance setting and if there are any wire breaks. A great DIY project to help keep dogs safe and happy.