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https://sport.woot.com/offers/sup…nt_wp_0_1
Waterproof Metal Detector/Pinpointer
Operation Frequency: about 12KHZ
Sensitivity Pinpoint: 4 cm
Indication: LED and Vibrate
Waterproof: under the water of no more than 10 meters
Pinpoint signal strength: 4 LED
Single Knob Control
Power: one 9V battery ( Not Included)
Low Battery Indication