Specifications:
Ideal for spoken word presentations
Karaoke performance
Multimedia and Instrument use
True Diversity
Professional UHF
Dual Channel
Channel 1 Frequency: 767.6MHz
Channel 2 Frequency: 763.1MHz
Dual Antenna 
2x Metal Microphone
XLR Balanced Output
Mix Output
LCD Digital Display
Power AC 220V
AA Battery
Imported Microphone Core
High-Definition True Sound Quality Output Interface
Working Frequency: 800MHz 32/64/99 Channels Can Be Freely Selected
Bandwidth: 40MHZ (20KHz Per Channel)
Stability: PLL Phase-Locked Loop
Frequency Synthesis Technology Within ±0.005
Frequency Stability: ±0.002%
Lasts about 8 hours