Features: The use of multi-level high-performance acoustic filter, with excellent anti-interference ability. This series of products in the high level and the first intermediate frequency amplifier stage are equipped with perfect filtering characteristics of the sound filter, in the second intermediate frequency amplifier stage, a fine frequency selective filter is obtained by using a ceramic filter with good consistency, greatly refers to the high anti-interference ability. Professional audio output: XLR balanced output and 6.3 unbalanced output. This series of products, all using XLR independent balanced output and 6.3 unbalanced hybrid output coexist, can adapt to various occasions of equipment connection, avoid equipment connection mismatch caused confusion and embarrassment. Automatic mute and engine balance elimination circuit, eliminate off balance machine and other engine noise. This series of products all have automatic mute and balance elimination circuit, clear the switch machine scale, avoid weighing noise and scene noise even damage the audio amplifying equipment and speakers. Using highly reliable surface mounting technology (SMT) production. This series of products all use high stability, high reliability surface mount components, the use of surface mounting technology and the application of the aging process to detect and eliminate the early failure of the components. Compared with the through pin type component. The stability, the reliability and the service life of the product are obviously improved. One to eight wireless professional microphone set, convenient and practical. Specification: Name: One to eight wireless professional microphone set Plug: US Plug / UK Plug / EU Plug (Optional) Model: X-8608 Battery: AA x 2 (not included) Frequency range: UHF 700MHz~790MHz Host Size: Approx. 42 x 22 x 4.2cm / 16.5 x 8.7 x 1.7in Comprehensive Parameters: Operating Frequency: VHF200MHz-270MHz Modulation Method: FM Channel Spacing: 500KHz Frequency Stability: ±0.001% Frequency Dynamic Range: ≥100B Maximum Frequency Offset: ± 25KHz Frequency Response: 40Hz-20KHz Integrated Signal to Noise Ratio: >105dB Comprehensive Distortion: 105dB Dynamic Range: ≥100dB Type: Moving coil / capacitive Polar Mode: Cardioid pointing / single pointing Frequency Response: 40Hz-20KHz Microphone sensitivity: -47±3dB @ 1KHz Power: ≤30mW Receiver Parameters: Oscillation Mode: Quartz crystal oscillation Frequency Range: VHF200MHz-270MHz Frequency Stability: ±0.001% Modulation Method: FM Signal to Noise Ratio: >105dB Proximity Interference Ratio: >80dB Distortion: