Here are a couple top sellers:
Hamilton Headsets | SM-V Classroom Deluxe Mono/Stereo Headphone with Volume Control

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Hamilton Headsets
Part number: SM-V / SMV
- With volume control
- Hamilton's full-featured deluxe headphones come equipped with our exclusive patented Automatic Stereo/Mono (ASMTM) switching capabilities. Our SM-V is a four-in-one design with volume control, operates on 1/8-inch stereo, 1/8- inch mono, 1/2- inch stereo and 1/4-inch mono modes.
- New soft leatherette style washable, replaceable ear cushions, new easier-to-wear lighter design with swivel ear-cups and soft coil, 3 meter long cord (almost 10 feet!) all contribute to longer fatigue-free use.
Impedance: 170 Ohms
Frequency response: 18-20k Hz.
Cord: 3meters.
Speaker drivers: 57mm cobalt magnet type
Weight 8 ounces
Full one year warranty.
Encore ENC2P Headphones | ENC2 Personal Stereo Headphone in Storage Bag

FREE Ground Shipping
Part number: ENC2P
Affordable stereo headphones
Perfect for use with CD players, MP3 Players, Computers & more
Packaged in sturdy resealable plastic bag with hole for hanging storage
A step above most inexpensive headphones; great sound quality for the price!
Specifications:
• Operates in 1/8 inch stereo
• Impedance: 170 Ohms
• Frequency response: 18-20k Hz
• Cord: 3.5 feet
• Speaker drivers: 40mm Cobalt magnet type
• Weight: 5 Ounces
• One (1) year warranty.
