1. Wireless receiver parameters

-frequencyranges: uhf645-693mhz

-frequency Stability: ±0.002% (locking with quartz crystal better than 15ppm)

- Sensitivity Sensitivity (peak deviation) :10 refresh V

- thewire: > 8 odb

- mirror interference Ratio P/N Ratio: >80dB

- S/N Ratio: >90dB

- Dilation Ratio: 1:2

- audio Output AF Output Voltage: adjustable 0 ~ 300mV

- receiving Channels: channel 2

Output jack: 6.3 unbalanced mixing port

- Power Supply: DC 13v-500ma (50Hz)

- Power Supply: 6W

Antenna: an external Antenna

- Dynamic frequency range of kinetic energy: >100dB

- combined distortion T.H.D: <0.5%

Operating Temperature Range: -10℃ ~ 50℃

- size specification: 420mm*160mm*45mm

2. Wireless microphone parameters

-frequencyranges: uhf645-693mhz

- Frequency Stability: 0.002% (locking with quartz crystal better than 15ppm)

- RF Power: 30mW

- current loss Cuttent Consumption: < main wave 40dB

-modulation Mode

- Deviation Range of Deviation: ±20KHz

-- compression Ratio: 2.1

- Microphone Head: super heart type

- Battery Type: two 1.5v alkaline batteries no.5

-antenna Anternna: Exterior Antenna

- Frequency Response: 50Hz ~ 15KHz

Receiver distance: 80m (ideal environment)

• Spacious UHF frequency transmission, the system uses the UHF UHF transmission segment, between 740MHZ-790MHZ frequency can be selected (the actual subjects to determine the frequency of use specified region). Using UHF band transmission can better solve theVHF (160MHZ-260MHZ) band "traffic jam band" and a variety of wireless microphone interference problems exist. Microcomputer CPU control, the entire system is controlled by a microcomputer hardware circuits can be selected frequency, display, transmit frequency data to themicrophone and other treatment, the traditional model is not easy to achieve a variety of functions to achieve. 

• Digital display, dual-screen digital display, all control channels can be displayed in the LED, easy to control the operation of the system. 

• digital frequency synthesis technology, the system oscillation mode using digital frequency synthesizer, with respect to the quartz-controlled wireless system, has a higher frequency stability, superior frequency selection characteristics can be achieved in a multi-channelsystem, the user can when the electromagnetic environment, optionally a clean, non-interfering frequency. 

• Infrared data transmission frequency synchronization settings, adjust the receiver receives the channel, the channel is set to pass the microphone data with an infrared mode that microphone transmitter frequency and receiver synchronization. 

• From Smart Mute to wake up dormant state within a few seconds can be free to switch, energy saving and thoroughly played the role of preventing the whistle, a microphone for a long time to solve the drawbacks of starting power, allowing users to sing at the same timepassion , keen characteristics can feel her use. 

• Intelligent power management system, equipped with high-capacity rechargeable lithium battery is fully charged any time the microphone working condition, allowed to have superior battery life