GC-1001 Is a high sensitivity handheld metal detector..Designed for body checking, search weapons and dangerous objects. Different metal size different alarm. To let you know the metal size directly. 

Features: 

1. Audible alert as well as LEDs on both the front and the back. 

2. Power Supply: One 9V Alkaline Battery. 

3. Current draw, 10Ma when alarms not activated. 

4. Earphone(Optional) 

5. Working temperature range: –15 to 55℃. 

6. Wrist strap. 

7. Operating frequency 50Hz ±10%. 

8. CE and RoHS. 

9. Dimensions: 410x90x30 mm, 355g. 

10. Box of 20: 440x440x230 mm Detection distance: 1. Pin：40-80mm 2. Lighter：120-135 mm 3. Knife：175-200mm 4. Gun：195-300mm Where to use: 1. Police, Army & Security 2. Exhibition & Entertainment 3. Explosive-proof security