Sony MDR-E827G

Sony Sports Water-Resistant Design for active lifestyles; stands up to rain, snow and occasional splashing; yellow Sports styling
Fontopia® In-The-Ear Design fits snugly, yet comfortably inside the ear; eliminates the headband so you can enjoy music while exercising, skating or dancing
Sony Acoustic Twin Turbo Circuitry uses sound chamber and ducts for improved efficiency, gets high sonic output from your portable stereo
Thinner Housing and slim duct for a snugger, more comfortable fit
Directional Bass Cap design enhances bass reproduction and provides better playback with Sony Mega Bass products
Neodymium Magnet for maximum energy in minimum size; Neodymium is far more powerful than conventional Samarium Cobalt or Aluminum magnets
13.5 MM Diameter Driver is small enough to fit inside your ear
Oxygen-Free Copper Cord assures high signal transmission, low noise
Nickel-Plated Mini-Plug resists corrosion for high conductivity, low noise
Compact, Wind-Up Case neatly stores the ear-buds and headphone cord when not in use; ideal for carrying in a pocket or purse
Type: Lateral, In-the-ear, Open Air, Dynamic

Driver Unit: 13.5mm Diameter
Magnet: Neodymium
Cord: OFC; Y-Shaped, 3.3 ft (1.0m)
Plug: Nickel plated
Stereo Mini Plug
L-Shaped
Impedance: 16 ohms @ 1 kHz
Sensitivity: 104 dB/mW
Power Handling Capacity: 50 mW
Frequency Response: 16 - 22,000 Hz