Full Duplex Tour Guide System

Special Features:
Full duplex wireless tour guide system, speaker wear the master device, and visitors wear slave devices.
Speaker and visitor could talking simultaneously, and other visitors will hear their talking.
Each visitor could speaking by pressing "PTT" button of the slave device.
The master device with "hang up" function, it could hang up the slave device which is speaking.
Both master device and slave device built in high quality microphone.
Easy to use, just need to connect earphone.
UHF band, PLL synthesized design.
128*64 dot matrix, yellow and blue dual color OLED screen.
Display of frequency, volume, battery, RF level, Audio level and microphone gain.
Welcome LOGO display can be custom made.
High performance double-IF circuit design.
Built-in multiple high performance SAW filters to anti-interference, and ensure multiple channels could using simultaneously.
Built-in high performance compander, crystal sound like CD.
8 steps of RF signal strength display.
8 steps of audio level display, and audio overload display.
16 levels of digital volume control.
21 levels of squelch sensitivity control.
21 levels of microphone gain control, setting range as 0~+20dB.
Quick mute function of microphone.
Slave device with automated shut down function.
Wear by lanyard.
High capacity lithium-ion battery, continuous operating time is more than 12 hours.
Operating range 100m in open ground.
Application:
Accessories:
Specifications:
RF Carrier Frequency Range:UHF 614~928MHz (F864-02)Oscillation Type:PLL SynthesizedTunable Steps25KHzFrequency Stability:±0.005%(0~50)ºCModulation:FM ±45KHz deviation (nominal)Intermediate frequency ( IF)Double-IF 110.6MHz/10.7MHzImage Rejection:>100dBAudio frequency response:50~15000Hz±3dBTotal Harmonic Distortion:<0.5% @1khz ±45KHZ modulationSignal-to-Noise ratio:>90dB(A)RF Power Output:10mWHarmonic Suppression:>80dBAF Output:3.5mm stereoVolume control:16 levels of digital volume controlBuilt-in Microphone:Φ9.7mm, unidirectional Microphone Gain:0dB~+20dB(step=1dB,21steps)Display Screen:128*64 dot matrix , yellow and blue dual color OLEDPower Supply:Built-in Lithium ion polymer battery , 3.7v/1020mAhOperation Time:about 12 hoursOperating Temperature:-10~60ºCDimension:138*49*16mmWeight:65g (With battery) Operating Range:>100m (Environment dependent)
Note: Different value according to versions of different countries.
•F790-20: Frequency Band 780~800MHz
•F860-20: Frequency Band 850~870MHz
•F864-02: Frequency Band 863~865MHz
•F915-20: Frequency Band 905~925MHz