This detector has been tested and works well.
Protection 200FT / 60M under fresh or saltwater Dimensions L 16.5″ / 42CM, W 3.9″/10CM, H 2.4″/ 6CM Weight 11.6oz / 330 gram Coil 5″x4″ / 13x10cm mono coil Battery Built in 3.7V 500mAh Li-Poly Battery Working Method Pulse induction. No falsing in saltwater and black sand enviorment Operating Frequency 95 kHz Tuning Automatic Indicators Audio / Vibration LED Beam Lights Response will be intense when probe close to objects. Controls Power switch (On / Off) Mode control(Vibration/Buzzer/ V+B) LED flashlight (Once power on)
Two control modes: snorkel dive mode(0~8M), dive mode(8~60M)