the next. we have a solar panel on the next. we have a solar panel on the back which charges the battery, they ll nice and lightweight and flexible slick as a plenty of new, it room to move around and there is a gps locator on the top here and we can see what the cow that at any time and that links the virtual fence behind us but can be wherever we wanted to be. the fence behind us but can be wherever we wanted to be. we wanted to be. the colours mean the national we wanted to be. the colours mean the national trust we wanted to be. the colours mean the national trust can we wanted to be. the colours mean the national trust can map - we wanted to be. the colours mean the national trust can map out - we wanted to be. the colours mean the national trust can map out an l the national trust can map out an area they want graze on a mobile phone app. if a cow then approaches the invisible boundary at first he has several music alerts. and if it doesn t turn back, instead trying to cro