Lenovo ThinkPad In-Ear Headphones with mic - 57Y4488

The ThinkPad In-Ear Headphones with microphone (57Y4488) offer high-quality voice and audio performance in a comfortable, lightweight, and attractive design.

Features include:

• Noise isolating in-ear design
• Well-balanced high and mid range sounds
• Discreet hands-free inline microphone for clear communications
• Omni-direction Microphone attached on cable
• An attached clothing clip on the cable
• Lightweight and comfortable for long periods of use
• 3 pairs (small, medium, large) of silicone sleeves tips for optimal fit and comfort
• Attaches using one of the following 3.5mm jack:
  • Single combination jack that has audio output and mic input
  • Dual jacks using the 2 x 3.5 jack adapter for seperate
    • Audio output 3.5mm jack
    • Mic input 3.5mm jack
• 2 x 3.5mm Jack Adapter included for maximum laptop and desktop compatibility
• Protective carry pouch for storage

Technical information:

• Connection: 1x 4 pole 3.5mm diameter
• Cable length: 1.2-meter (3.94-feet)

Electrical specifications:

• Headphones
  • Frequency response: 20~20 KHz is preferred
  • Sensitivity: 100dB at least
  • THD: Less than 0.5%
  • Impedance: 16~32OHM will be considered
  • Stereo speakers
  • Woofer type transducer driver for good quality base response is desired
  • Stereo speakers for sound and good base response
• Microphone:
  • The headphones are a noise canceling microphone
  • Frequency response: 100~15 KHz
  • Sensitivity:-35~-45dBv/Pa.
  • Direction: Omni-direction
  • Signal to noise ratio shall be greater than 60dB
  • Single or array microphones shall be designed to reduce any popping, hissing or noise
  • Noise Canceling Microphone for clear call reception

   

Physical specifications:

• ThinkPad In-Ear Headphones with mic (57Y4488):
  • Approximate weight: 15 g (0.03 lb) - Headphones
  • Approximate weight: 9 g (0.02 lb) - Adapter
  • Approximate length: 1.2-meter (3.94-feet) - Cable
• ThinkPad In-Ear Headphones (57Y4488) packaged in a carton:
  • Approximate height: 51 mm (2.0 in)
  • Approximate depth: 76 mm (3.0 in)
  • Approximate width: 102 mm (4.0 in)
  • Approximate weight: 100 g (0.22 lb)

Systems that have one of following:

• Single combination (audio output and micrphone input) 3.5 jack
• Seperate audio output and microphone input 3.5mm jacks.
  • Audio output is the green color connector
  • Microphone input is the pink color connector

The first image is the "single combination" jack, and the second image is the seperate "audio output" and "microphone input" jacks.