Since it uses your smartphone as a control box, our metal detector is whole-body waterproof with an IP68 rating. 

There is a depth indicator bar on the left sidebar of the application that tells you the approximate depth of the coin. 

The binocular shell is made of environmentally friendly, odorless rubber material. The surface of the binoculars is nicely matted and effectively prevents slipping. 

(1)Please check to make sure you have installed 1.5V 6*AA battery. Do not use inferior batteries as their voltage is lower than 1.5V. (We recommend brands like Energizer, Duracell, AmazonBasics, etc.). (2)Make sure the polarity is correct and the contact with the spring is normal. (3)Press and hold the power button for at least 3 seconds to power on. (4)If it still cannot be turned on after 1-3 steps, please try to use a power bank. 

This is a filter to fit a 67mm lens as it says on the box.