<br /><strong>Product Parameters:</strong><br /> Input Voltage Range: DC3.5V-5.5V<br /> Maximum Current: ≤40mA<br /> Battery Type:Built-in 400mah Polymer Battery<br /> Charging Time:<4hours<br /> Continuous Working Time :≥10hours<br /> Frequency Band: 2400-2483Mhz <br /> Modulation Method: GFSK<br /> RF Transmission Power : 10dBm<br /> Transmission Distance: 40m(Unimpeded&Open area)<br /> RX Sensitivity: -88dBm<br /> Sampling Frequency: 16KS/s<br /> S/N Ratio:≥65dB（f=1kHz, P=1Pa A curve）<br /> <br /> <strong>What's in the package:</strong><br /> 1*Handheld microphone<br /> 1*Removable earhook<br /> 1*Signal receiver<br /> 1*USB charge cable<br /> 1*6.35mm exchange plug for receiver<br /> 1*User maual<br /> <br /> <br />