Driver unit:30mm Mylar Speaker Frequency response:20-20KHZ Impedance:32ohm+/-10% Sensitivity:103dB S.P.L.at 1KHz+/-3db Color option:Black,Green Distance:15M FM RECEIVE:88-108MHz ULTRA LIGHTWEIGHT TRANSMIT OPERATION DISTANCE:15M SI... - Update: 2009-06-03

2 x 3.5mm PIN - Update: 2009-06-02

SIZE"53*32*49CM/50PCS/CTN QTY:17000PCS/20CTNR - Update: 2009-06-02

Mic type: 6mm x 5mm Impedance: maximum 2.2K Sensitivity: -58db+/-2dB (0db-1vv/pa) Directivity: omnidirectional S/N ratio: more than 60dB Sensitivity reduction: within-3dB at 1.5V Mic frequency range: 30Hz-16000Hz Speaker: ... - Update: 2009-06-02

Mic type: 6mm x 5mm Impedance: maximum 2.2K Sensitivity: -58db+/-2dB (0db-1vv/pa) Directivity: omnidirectional S/N ratio: more than 60dB Sensitivity reduction: within-3dB at 1.5V Mic frequency range: 30Hz-16000Hz Speaker: ... - Update: 2009-06-02

1.Mic Type:9mm*7mm 2.Impedance:Maximum 2.2K 3.Sensitility:-58db+/-2db(0db-1vv/pa) 4.Directivity:Omnidirectiomal 5.S/N Ratio:More than 60dB 6.Sensitivity Reduction:Within-3dB at 1.5V 7.Mic Frequency Range:30Hz-16000Hz 8.Speaker:40mm 9.... - Update: 2009-06-02

1.Mic Type:9mm*7mm 2.Impedance:Maximum 2.2K 3.Sensitility:-58db+/-2db(0db-1vv/pa) 4.Directivity:Omnidirectiomal 5.S/N Ratio:More than 60dB 6.Sensitivity Reduction:Within-3dB at 1.5V 7.Mic Frequency Range:30Hz-16000Hz 8.Speaker:40mm 9.... - Update: 2009-06-02