Light weight ergonomic design with temperaryly low sensitivity buttun Detection Detects items of all types of metal: Ferrous and non-ferrous Alarm Choice of sound alarm or silent vibration alarm Features Easy to use, 3 position switch for power, sound and vibration Sensitivity setting at optimum level-no tuning required Uses one 9 volt battery Low battery indicator Manufactured in gray, Flame resistance Quick-change battery compartment Charger jack (1) indicators Solid yellow LED: AL - target detected Flashing green LED: Pw - power on Flashing red LED: BT - low battery indicator (2) alarm signal Sound mode: Buzzer with red LED Vibration mode: Vibrator with red LED (3) control 3 way switch Forward position: S - sound on Center position: O - power off Back position: V - vibration on (4) battery Single 9 volt alkaline or ni-cd Battery life: 30 to 40 hours (ni-cd) 28 hours (alkaline) (5) dimension Weight: 6.88 ounces (195g) Length: 14.76" (375mm) Width: 3.03" (77mm) Thickness: 1.02" (26mm) (6) operating temp -15 to +45 degrees centigrade