Sennheiser CX 100 In-Ear Wired Headphones:

Feature:

• Powerful sound experience with a deep and punchy bass
• Ultra small design provides ideal wearing comfort
• Choice of four ear adapter sizes ensure ideal fit for effective noise blocking
• 1.2 m symmetrical cable with 35 mm headphone jack works any audio source including iPhone, iPad series and Android devices (listen-only)
• Frequency response: 17–20,000 Hz (-10 dB)

Specification:

• Ear coupling: Ear-canal
• Transducer Principle: Dynamic
• Acoustic Principle: Closed
• Jack Plug: 3.5 mm angled
• Cable length: 1.2 m
• Weight (headphone): 10 g
• Frequency response: 17 – 20,000 Hz (-10 dB)
• Impedance: 28 Ω
• Sound pressure level (SPL): 119 dB SPL @ 1 kHz, 1V RMS
• THD – total harmonic distortion (1 kHz, 100 dB SPL): < 0.5 %