I use these with my metal detector and they're awesome. So comfortable and you hear every little clue the detector is giving you. Same as what Minelab includes with their machines including the CTX 3030. 

Headphone Features:
-Leatherette ear cushions deliver maximum isolation
-Durable design
-Dynamic elements for extended frequency response
-Freq resp: 30hz–20khz
-Imp: 32ω
-High fidelity stereophone utilizes neodymium rare earth magnet and 16 micron mylar element for deep bass and treble clarity
-Flexible headband with sling allows for easy, single sided listening and maximum durability
-Straight, single-entry, 8-foot cord for home and portable use
-Includes 1/8-inch and 1/4-inch stereo plugs for home and portable use

Volume Control Features:
-Volume control provides convenient level adjustment from headphones
-Connects to any 3.5mm Plug
Includes pocket clip
-Limited lifetime Warranty
-Includes pocket/belt clip for convenient positioning
-Can be used with any portable music device
-Connects to any 1/8-inch headphone jack
-Minijack iPhone compatible plug (not gold plated)