Features
1. Our HT-66A/HT-66B/HT-77A/HT-98B UHF wireless microphone system provides a new energy saving mode, automatic EQ control, tone correction and IR frequency sync functions.
2. It uses a high frequency SAW filter to maximally filter out interfering signals.
3. The use of built in audio compression expander circuit greatly improves SNR.
4. The unique audio compressor design effectively eliminates whistle.
5. Frequency synchronization between any receivers and any microphones in the system is realized.

Technical Specifications of HT-66A/HT-66B/HT-77A/HT-98B UHF Wireless Microphone System

Working frequency: 740.000MHz-789.750MHz /610.00MHz-659.75MHz Modulation: Broad Band FM
Frequency channel: 200
Switching bandwidth: 250 kHz
Frequency stability: ±0.005%
Dynamic range: 100dB
Max. deviation: ±4kKHz
Audio frequency response: 80Hz-18KHz (±3dB)
Signal noise ratio: > 105dB
THD: <0.5%

Technical Specifications of HT-66A/HT-66B/HT-77A/HT-98B UHF Wireless Microphone System Receiver
Receiving mode: DPPL
Medium frequency: 110MHz, 107MHz
Antenna connection: BNC/50Ω
Sensitivity: 12dBuV
Sensitivity adjustment range: 12~32dBuv
Noise Rejection: >75dB
Max. output level: +10dBV

Technical Specifications of HT-66A/HT-66B/HT-77A/HT-98B UHF Wireless Microphone System Transmitter
Antenna: Built-in
RF Output: <10mW
Noise Rejection: -60dB
Power: 2pcs AA batteries
Battery life: 10 hours in normal power, 12 hours in low power
Transmission range: 100m

UHF Wireless Microphone HT-590, HT-590A

Uses a UHF 470-960MHz PLL frequency synthesizer technology
Uses a multi-channel high band and intermediate band frequency selective filtering, which fully eliminates interference signals
250 channels programmed, compatible with UHF frequencies within a bandwidth of 100 KHz frequency steps (HT-590)
100 channels programmed, compatible with UHF frequencies within the bandwidth of 300KHz frequency steps (HT-590A)
Built-in feedback eliminating technology effectively decreases feedback and noise
Built-in multiple noise detecting circuit and TONE-LOCK system to ensure the system has a strong anti-jamming function
Perfect performance with the best chips and components, uses an SMD original mount design to enhance the product quality and stability

UHF Wireless Microphone HT-580

Uses a UHF 470-960MHz PLL frequency synthesizer technology
Uses a multi-channel high band and intermediate band frequency selective filtering, in order to fully eliminate interference signals.
A built-in feedback eliminating technology can effectively decrease the feedback and noise.
A built-in multiple noise detecting circuit and TONE-LOCK system make sure the system has a strong anti-jamming function.
Perfect performance with the best chips and components, it uses an SMD original mount design to enhance the product quality and stability
The operation distance reaches up to 60 meters with the best conditions, and 40 meters under normal conditions
The frequency and channel are locked to protect the anti-jamming functions

Technical Parameters
Carrier Frequency: 470-960MHz
Modulation: FM
Frequency Response: 60-16KHz
Frequency Stability: 20ppm
Max deviation: +/-25 KHz
T.H.D: ＜1%
RF Output: 30mW
Current Consumption: 100mA
Pressure limit sensitivity: -70~-98 dBM
Pilot Carrier Frequency: 32 KHz