The Garrett 11651 Metal Detector is the most popular worldwide and in use by professionals in the security and law enforcement industry. Hand-Held, ABS With Rubber Grip Material Exterior Length (In.) 16-1/2, Exterior Width (In.) 3-1/4Thickness (In.) 1-2/3, Weight (Lbs.) 1-1/8Operating Frequency (Hz) 93k, Max. Operating Temp. -35 F to 158 F, Scan Depth (In.) 10LED/Audio/Silent Vibrate Indicator, 9 Volt Battery, Battery Life 100 Hours Standards National Institute of Justice Standard 0602.02 Audio Alarm: Selectable Bbm 58dad9a9