• Product range： BM-555 Respective category： VHF ------Product detailed parameter MAIN 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. The wireless microphone use hidden antenna .look good and are useful 4. There is a volt indicating circuit in the microphone.It can tell you if it is necessary to change the battery. 5. A specially designed circuit switch is on the phone . It is for clearing up waves of miscellaneous signals. 6. All use quartz crystal oscillating circuits ,so the frequency is very steady. 7. With audio compressing-expanding technology ,the machine can lower noises and increase the dynamic range .It can also lower reecho. 8. Particular noise detect to avoid interference from outside open the mute system. 9. Choose excellent chipset and high quality component,so that its timbre is very good. 10. Longest distance in open :50m.Idealest distance in open: 30m 11. It is suitable for stages、ballrooms、auditoria、classrooms and families. RECEIVER : * POWER SUPPLY: DC 17V * CONSUME POWER: 4 WATER * SIGNAL/NOISE RATIO: MORE THAN 90DB * IMAGE & SPURIOUS REJECTION:MORE THAN 80db * BORDER UPON CHANNEL REJECTION:MORE THAN 80db * RECEIVING SENSITIVTY: 10dBuV(SINAD=30dB) * DE-EMPHASIS: 50us HANDING MICROPHONE : * TRANSMITTER POWER: 8.5mW * MODULATION TYPE : FM,F3F * MAX DEVIATION: ±25Khz * SPURIOUS EMISSION:MORE THAN 40dB(WITH CARRIER) * BATTERY VOLTAGE: 9V * CONTINOUS USING: 6 hours COMPREHENSIVE PERFORMANCE : * CARRIER FREQUENCY: VHF210～270MHz * 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

Product range： BM-555 Respective category： VHF ------Product detailed parameter MAIN 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. The wireless microphone use hidden antenna .look good and are useful 4. There is a volt indicating circuit in the microphone.It can tell you if it is necessary to change the battery. 5. A specially designed circuit switch is on the phone . It is for clearing up waves of miscellaneous signals. 6. All use quartz crystal oscillating circuits ,so the frequency is very steady. 7. With audio compressing-expanding technology ,the machine can lower noises and increase the dynamic range .It can also lower reecho. 8. Particular noise detect to avoid interference from outside open the mute system. 9. Choose excellent chipset and high quality component,so that its timbre is very good. 10. Longest distance in open :50m.Idealest distance in open: 30m 11. It is suitable for stages、ballrooms、auditoria、classrooms and families. RECEIVER : * POWER SUPPLY: DC 17V * CONSUME POWER: 4 WATER * SIGNAL/NOISE RATIO: MORE THAN 90DB * IMAGE & SPURIOUS REJECTION:MORE THAN 80db * BORDER UPON CHANNEL REJECTION:MORE THAN 80db * RECEIVING SENSITIVTY: 10dBuV(SINAD=30dB) * DE-EMPHASIS: 50us HANDING MICROPHONE : * TRANSMITTER POWER: 8.5mW * MODULATION TYPE : FM,F3F * MAX DEVIATION: ±25Khz * SPURIOUS EMISSION:MORE THAN 40dB(WITH CARRIER) * BATTERY VOLTAGE: 9V * CONTINOUS USING: 6 hours COMPREHENSIVE PERFORMANCE : * CARRIER FREQUENCY: VHF210～270MHz * 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