Made in the USA of domestic and imported parts Electronic Circuit: Instead of manual adjustment with a screwdriver, TRANSIT’s sensitivity adjusts itself automatically: Unlike other detectors, when TRANSIT detects metal, it alarms for several seconds, then resets to zero, ready to detect any further metal items Operating Frequency: *5kHz Battery: *-Volt alkaline or NiMH rechargeable, typically lasting *0 hours or 2, **0 scanning operations Charging Voltage: On models with built-in charger (TRANSIT*3 and *4) specify **0V AC or **0V AC Operating Voltage: between 6.8 and *0V DC Battery Voltage = OK: green LED indicator light Operating Current: *0mA typical Detection: Medium-size handgun from *0cm Large knife from *3cm Razor blade from 7cm Hat pin from 3cm Environment: Temperature range **5° to **5° C Length x Width: **5 x *0mm Weight: **2g (without battery)