15'' overall. Streamlined design. Detect ferrous and non-ferrous metals. Two alarm modes: Buzzer/Led; Vibration/LED. High level adjustable sensitivity. Low battery indicator/charge lamp alert. Frequency: 25KHz. Operating temperature: -15C to 55C. Voltage: 9V. Detection distances: Pin (30-60mm); One coin (75-100mm); 6'' knife (160-180mm); 64 model hand gun (180-195mm). Boxed.