Features:1) Type: Simple type earphone2) Speaker: Φ15mm3) Sensitivity:102Db S. P. L at 1khz4) Speak frequency response:20Hz-20,000Hz5) Impedance:32Ω6) Rated power:100mw7) Power capability:10

Main Features:1) Mic Type: Φ9mm x 7mm2) Impedance:maximum2.2KΩ3) Sensitivity: -58db ± 2db(0db=1v/pa)4) S/N Ratio:More than 60db5) Sensitivity Reduction:Within-3db at 1.5v6) Mic Freque

Specifications:1) All in one card reader2) USB 2.03) Only Windows95,98 need driver.4) Suitable for "MS, MS Pro, MS-Magic-gate, MS Duo, MS Pro DUO, RS MMC, Mini SD, MD, CF, CFII, SM, XD, MMC, MMC

Features:1) Mic type: Φ9mm x 7mm2) Impedance: Maximum2.2kΩ3) Sensitivity: -58dB ± 2dB(0dB=1V/pa)4) Directivity: Omnidirectional5) S/N ratio: More than 60dB6) Sensitivity reduction: With

Key Features:1) Mic Type: Φ9mm x 7mm2) Impedance:maximum2.2KΩ3) Sensitivity: -58db ± 2db(0db=1v/pa)4) S/N Ratio:More than 60db5) Sensitivity Reduction:Within-3db at 1.5v6) Mic Frequen

Main Features:1) Mic type: Φ9mm×7mm2) Impedance: maximum2.2kΩ3) Sensitivity: -58dB±2dB (0dB=1V/pa)4) Directivity: omnidirectional5) S/N ratio: more than 60dB6) Sensitivity reduc

Main Features:1,Supporting SIP, H.323, MGCP, IAX2, net2phone etc lot of protocol;2,Supporting Skype, MSN, QQ etc many software;3,USB 2.0 port;4,16 bit sound card inside, the PC can without Sound Card;

Main Features:1) Mic type: Φ9mm x 7mm2) Impedance: maximum2.2kΩ3) Sensitivity: -58dB±2dB (0dB=1V/pa)4) Directivity: omnidirectional5) S/N ratio: more than 60dB6) Sensitivity reduction

Specifications:1) Mic Type: Φ9mm x 4.5mm2) Impedance:maximum2.2KΩ3) Sensitivity: -38db ± 2db(0db=1v/pa)4) Directivity:omnidirectional5) S/N Ratio:More than 60db6) Current Consumption:Ma