UHF band makes fewer interference compared with the conventional VHF band and more reliable transmission; 
DPLL multi-channel and frequency synthesis technology provides up to 200 channel selection within interval of 250KHZ within the range of 50MHZ and satisfies simultaneous operation of multiple sets and keep away interference; 
The advanced frequency pairing technology automatically locks and adjusts the frequency by only one press if the frequencies of the transmitter and the receiver are not paired and operation is convenient; 
High-end LCD makes working status of the receiver and the transmitter clear; 
The wireless conference transmission system is powered by 2 pieces of AA batteries and hi-alkali battery lasts longer. 

The conference desktop, handheld, clip and head-mounting are optional. 

Receiver indexes 
Receiver mode: secondary conversion super heterodyne 
Intermediate frequency: first frequency: 100MHz; second 10.7MHz
Wireless interface: BNC/50Ω
Sensitivity: 12dBμV (80DbS/N) 
Range of sensitivity: 12-32 dBμV
Spurious suppression: >75dB
Maximum output level: +10dBV

Transmitter index 
Wireless mode: wearing transmitter 1/4 wavelength whip antenna, handheld microphone built-in helix antenna 
Output power: high power 30mW; low power 3mW
Spurious suppression: -60dB
Power supply: 2 pieces of AA batteries 
Duration: more than 8 hours at 30mW; more than 12 hours at 3mW 

Up to 5 sets (20 conference transmitter) modulating methods under the same space and the same frequency band: 
Set 1: 1, 55, 121 and 174
Set 2: 4, 58, 130 and 183
Set 3:  9, 63, 137, 190
Set 4: 16, 70, 142, 195
Set 5: 25, 79, 145, 198
Intermodulation interference may be caused if the frequency is not set properly. 

Telecommunication channels and frequency range: 
CHANNAL A
CHANNAL: 0-49 FREQUENCY: 740.000MHZ-752.250MHZ
CHANNAL B
CHANNAL: 50-99 FREQUENCY: 752.500MHZ-764.750MHZ
CHANNAL C
CHANNAL: 100-149 FREQUENCY: 765.000MHZ-777.250MHZ
CHANNAL D
CHANNAL: 150-199 FREQUENCY: 777.500MHZ-789.750MHZ