Frequency B wireless microphone 8 channel system Green LED display Our store has 2 different frequency products?Frequency A is Green LED display ?Frequency B is Orange LED display. Buyers can use 2 different sets at same time same place without interference. (3 years free warranty). (This Microphone system comply with new FCC frequency rules) 8 mics can use together without influence Frequency range : (521.5, 530.1, 536.8, 543.7)& (542.2, 544.4, 556.8, 560.8 )MHz Features: 8 Channel Receiver with 8 lavalier 8 headsets Microphones Individual Volume Control on each Channel Two/ 6.35" Mixed and 8 XLR Individual Outputs Perfect operation status indicater Four Telescoping Receiver Antennas Broad frequency response range, super low distortion Full metal design Use 2*1.5V AA battery Specifications: Overall System Number of Channels:8 channels Stability:±0.006% Normal deviation:±22kHz S/N ratio:<120dB T.H.D:<0.6% Frequency response:50Hz-15kHz Receiver Sensitivity:>80dB Audio output:Balanced and Unbalanced Power requirement:AC 16V,2000mA Dimensions:610×400×190mm Weight(weight):Approx 8 kg Wireless Microphone Cartridge:Dynamic Antenna:Built-in RF output:<10mW Normal deviation:±22kHz Maximum deviation:±80kHz Comes With 8 bodypacks 8 lavaliers 8 headsets 4 antennas 1 audio cable 1 Base 8 channel Transmitter US 110-240v Power Adapter