*Power Switch: On/Off switch
*Battery: 1pc 9V alkaline battery or 1pc 9VNi-MH
rechargeable battery & 110V or 220V adaptor (optional)
*No tools require to replace battery
*It's operation is automatic,using combination of audio alarm, silent vibration and and LED light to announce the presence of metallic object.
|*Detect Distance: |
Pistol at 9", Pocket knife at 6", Steel Key Ring at 5", Razor Blade at 3", Hatpin at 1"
*LED battery check