Steelmate PTS 400N

Price: £199.99 Sensors/alerts: Four/audible & display

Great build quality – and you pay for it. An angled display (reversed for viewing in the mirror) shows a countdown in metres, while seven-segment bar graphs at either side indicate where the object is. There are also warning beeps, providing the best of both worlds. Yet while car and bollard results were good, it wasn’t so quick to detect our hose.