The 3115 AC Voltage Sensor by Santronics is a compact non-contact detector ideal for automotive use. This modern-style sensor is powered by 2 AAA batteries and features a corded electric power source. With a set of 1 red sensor included, this product is lightweight at 39.7 grams and has dimensions of 9 x 4.9 x 0.2 inches. It is a reliable tool for diagnosing electrical systems in vehicles.