I'm an international seller, your order will be shipped from China, we shipped all parcels by Yun Express, it will delivered in 8-14 days. please allow the necessary time about minimum 14 working days for delivery right now depending on your shipping country, due to ongoing delays in postal deliveries globally.Main features:Suitable for studio, karaoke, broadcasting, etc.Effective distance: 10-15 metersAcceptance method: superheterodyneAudio Distortion: less than 1%Dynamic Range: 80DBFeatures:1. Multi-stage narrow-band high-frequency and intermediate-frequency frequency selective filtering is adopted to fully eliminate interference signals.2. With low voltage design, the battery voltage can still work as low as 3V.3. With special ALC circuit, there is no need to worry about the volume being too loud and distorted.4. Using low-power components, the battery has a long service life.5. Handheld microphone invisible antenna, beautiful and practical.6. The handheld microphone has a power indicator circuit, prompting to replace the battery.7. Ad hoc hand-held microphone switch noise shock wave elimination circuit.8. Has extremely high frequency stability performance.9. Less noise and large dynamic range.10. Equipped with the function of reducing the feedback whistle, which can effectively reduce the feedback whistle.11. Unique noise squelch function, rejecting external interference to turn on the local sound system.12. Select excellent chips and high-quality components, so that the sound quality of this machine is excellent.Comprehensive performanceCarrier frequency: FM121.7-128.7MHz Frequency stability:30ppmDynamic range: 90dBHarmonic Distortion: 1%Frequency response: 40Hz18KHz3dBAudio output: Independent: 0400mVHybrid: 0200mVTemperature range: -10 TO 50Fixed receiverUse power supply voltage: AC220VPower consumption: 1 WSignal-to-noise ratio: 80dBArtifact interference ratio: 70dBAdjacent channel interference ratio: 70dBReceiving sensitivity: 12dBu(S/N=20dB)