Moving Frequency Response: 20 Hz–20 KHz Type/Diameter of Coil: 40 mm Length of Cable: 2.2m (Braided Cable) It is 108 +/- 3dB sensitive. Maximum Power: 30 mW Resistance: +/- 15% at 32 Ohm 40mm is the speaker's diameter. Type of Headset Connector: Microphone USB 2.0 Resistance: ≤2.2K Ω 80mA of current Voltage: 3V DC 296g in weight