• Product range： BM-3031 Respective category： VHF ------Product detailed parameter FUNCTION: 1. Using VHF 220-270 Mhz band to avert interferencing frequency. 2. Using multilevel high frequency and mid frequency narrowband filter, so as to dispel any possible interferencing signals. 3. Dual channel designed,two microphones can use at the same time to sing without any disturbing caused by. 4. Beautiful LCD display. 5. The wireless microphone use hidden antenna .look good and are useful 6. There is a volt indicating circuit in the microphone. It can tell you if it is necessary to change the battery. 7. A specially designed circuit switch is on the phone.It is for clearing up waves of miscellaneous signals 8. All use quartz crystal oscillating circuits, so the frequency is very steady. 9. With audio compressing-expanding technology, the machine can lower noises and increase the dynamic range. It can also lower reecho. 10. The receiver use multilevel high frequency enlarge, so it has high sensitivity. 11. It has channel separate outputing and mix outputing, and it can be connected with the sound-adjusting stage and the karaoke enlarger. 12. Special tone key locked identity functions to avoid interference signal from outside open the mute system. 13. There are mulriple noise detect circuit ,multi circuits, So it has strong anti-jamming speciality. 14. Choose excellent chipset and high quality component ,so that its timbre will be very good. 15. Longest distance in open :100m.Idealest distance in open: 60m 16. Frequency response tailored for vocals, with brightened midrange and bass rolloff 17. Uniform cardioid pickup pattern isolates the main sound source and minimizes background noise 18. Pneumatic shock-mount system cuts down handling noise 19. Effective, built-in spherical wind and pop filter 20. It is suitable for small and large stages、ballrooms、auditoria 、classrooms and families. COMPREHENSIVE PERFORMANCE: * CARRIER FREQUENCY: VHF220～270MHZ * FREQUENCY STABILIZATION LESS THAN±30ppm * DYNAMIC RANGE: MORE THAN 90dB * TOTAL HARMONIC DISTORTION: LESS THAN 0.5% * FREQUENCY RESPONSE: 40HZ-15KHZ±3dB * AUDIO OUTPUT LEVEL: SEPARATE TYPE:0--±400mV 　 MIX TYPE: 0--±200mV FIXED RECEIVER : * POWER SUPPLY: AC 220/45-60HZ * CONSUME POWER: 4 WATER * SIGNAL/NOISE RATIO: MORE THAN 90DB * IMAGE & SPURIOUS REJECTION:MORE THAN 80db * BORDER UPON CHANNEL REJECTION:>80db * RECEIVING SENSITIVTY: 10dBuV(SINAD=30dB) * DE-EMPHASIS: 50us HANDING MICROPHONE: * TRANSMITTER POWER: 8.5mW * MODULATION TYPE : FM,F3F * MAX DEVIATION: ±25Khz * SPURIOUS EMISSION: >40dB(WITH CARRIER) * BATTERY VOLTAGE: 9V battery * CONTINOUS USING: 6 hours

Product range： BM-3031 Respective category： VHF ------Product detailed parameter FUNCTION: 1. Using VHF 220-270 Mhz band to avert interferencing frequency. 2. Using multilevel high frequency and mid frequency narrowband filter, so as to dispel any possible interferencing signals. 3. Dual channel designed,two microphones can use at the same time to sing without any disturbing caused by. 4. Beautiful LCD display. 5. The wireless microphone use hidden antenna .look good and are useful 6. There is a volt indicating circuit in the microphone. It can tell you if it is necessary to change the battery. 7. A specially designed circuit switch is on the phone.It is for clearing up waves of miscellaneous signals 8. All use quartz crystal oscillating circuits, so the frequency is very steady. 9. With audio compressing-expanding technology, the machine can lower noises and increase the dynamic range. It can also lower reecho. 10. The receiver use multilevel high frequency enlarge, so it has high sensitivity. 11. It has channel separate outputing and mix outputing, and it can be connected with the sound-adjusting stage and the karaoke enlarger. 12. Special tone key locked identity functions to avoid interference signal from outside open the mute system. 13. There are mulriple noise detect circuit ,multi circuits, So it has strong anti-jamming speciality. 14. Choose excellent chipset and high quality component ,so that its timbre will be very good. 15. Longest distance in open :100m.Idealest distance in open: 60m 16. Frequency response tailored for vocals, with brightened midrange and bass rolloff 17. Uniform cardioid pickup pattern isolates the main sound source and minimizes background noise 18. Pneumatic shock-mount system cuts down handling noise 19. Effective, built-in spherical wind and pop filter 20. It is suitable for small and large stages、ballrooms、auditoria 、classrooms and families. COMPREHENSIVE PERFORMANCE: * CARRIER FREQUENCY: VHF220～270MHZ * FREQUENCY STABILIZATION LESS THAN±30ppm * DYNAMIC RANGE: MORE THAN 90dB * TOTAL HARMONIC DISTORTION: LESS THAN 0.5% * FREQUENCY RESPONSE: 40HZ-15KHZ±3dB * AUDIO OUTPUT LEVEL: SEPARATE TYPE:0--±400mV 　 MIX TYPE: 0--±200mV FIXED RECEIVER : * POWER SUPPLY: AC 220/45-60HZ * CONSUME POWER: 4 WATER * SIGNAL/NOISE RATIO: MORE THAN 90DB * IMAGE & SPURIOUS REJECTION:MORE THAN 80db * BORDER UPON CHANNEL REJECTION:>80db * RECEIVING SENSITIVTY: 10dBuV(SINAD=30dB) * DE-EMPHASIS: 50us HANDING MICROPHONE: * TRANSMITTER POWER: 8.5mW * MODULATION TYPE : FM,F3F * MAX DEVIATION: ±25Khz * SPURIOUS EMISSION: >40dB(WITH CARRIER) * BATTERY VOLTAGE: 9V battery * CONTINOUS USING: 6 hours