Security Hand Held Metal Detector Digital , Rechargeable Metal Detector Long Range

Description:

• ​Working frequency:About 20 KHz
• Alarms:sound (or vibration) and light
• Power supply:Standard 6F22/15F8H 9V battery or rechargeable battery(optional)
• Energy smart: can work 40 hours continuously
• Except the light alarm, audible alarm and the vibratory alarm can be chosen
• When the battery nearly dies, audible alarm or vibratory alarm should be a warning
• Turn on (off) the detector, it will give you an audible alarm or a vibratory alarm
• There are also two sensitivities, high and low, to select
• Rechargeable:charge it about 4-6 hours after the battery die
• Self-checking: it self-checks when it starts
• Using ABS, durable

Specifications:

Applications:

Security check: avoid carrying contraband, such as knives, guns and more

Factory: avoid valuables losing

Education: avoid cheating, prevent from carrying cheating tools, such as phones,  electronic Dictionary and more when examine

Ultimate sensitivity:

38 pistol: 20cm

Little knife: 15cm

Blade: 10cm

Coin: 8cm