Detects items of all types of metal: Ferrous and non-ferrousChoice of sound alarm or silent vibration alarmEasy to use,3 position switch for power, sound and vibrationSensitivity setting at optimum level-no tuning requiredUses one 9 volt batteryLow battery indicatorManufactured in gray,Flame resistanceQuick-change battery compartmentCharger jack(1) indicatorsSolid yellow LED: AL - target detectedFlashing green LED: Pw - power onFlashing red LED: BT - low battery indicator(2) alarm signalSound mode: Buzzer with red LEDVibration mode: Vibrator with red LED(3) control3 way switchForward position: S - sound onCenter position: O - power offBack position: V - vibration on(4) batterySingle 9 volt alkaline or ni-cdBattery life:30 to 40 hours (ni-cd)28 hours (alkaline)(5) dimensionWeight:6.88 ounces (195g)Length:14.76" (375mm)Width:3.03" (77mm)Thickness:1.02" (26mm)(6) operating temp-15 to +45 degrees centigrade* one more important thing, we acquired "ce(certificate of emc compliance)" and canimplement "oem" as your request. If you have further request, please do not hesitateto contact us. We will be at your service anytime. producing area:China