A tour guide system is a wireless and portable radio system used to transmit an audio message from a presenter to listeners. A tour guide system consists of a microphone transmitter for the presenter, receivers for the audience and a charger storage case.
Tour guide systems are used when normal conversation between a presenter and listeners is difficult. Whether speaking to a large group of people outdoors, a tour in an area with high ambient noise, or not wanting to disturb other people in the same environment, a tour guide system helps you provide a professional service.
A tour guide system allows the guide to be clearly heard without having to strain their voice, while reducing frustration and confusion for their clients.

1-PLL frequency synthesis technique for stable signal transmission
2-UHF frequency range with 6 selectable channels
3-Low power consumption design,receiver can work for more than 24hrs by using 2pcs alkaline batteries
4-One transmitter can be operated with multiple receivers within the operating range
5-Dynamic expanding circuit for high S/N ratio
5-Complex interference-free circuit for using more than 4 sets simultaneously without mutual interference
6-Both transmitter and receiver use LCD-display to indicate 7-frequency,channel,battery,level status
8-Long operating range up to 100m

Specification
Carrier Frequency :863-865MHZ
Frequency Response: 30Hz-15KHz
Number of Channels:6
Transmit Power: ≤10dBm
Receiving Sensitivity: S/N:12dB 3uV
S/N Ratio: ≥50dB
Operating Range: >100m
Transmitter and Receiver Power Supply: 2x1.5 AA Alkaline battery

1-VHF radio frequency for interference-free receptio
2-Frequency synthesized PLL circuitry for stable signal transmissio
3-Two jacks for the microphone and line ensuring variable utilization
4-Automatic mute control for silent standby
5-Individual volume control on each receiver

Specification
Frequency Control: PLL synthesized function
Carrier Frequency: 433MHz
Modulation Mode: FM
Frequency Response: 60Hz-15kHz
S/N Ratio: >45dB (at 1kHz)
Total Harmonic Distortion: <1%
Transmit Power: ≤10mW
Input Level: Virtual Value 500mV
Transmitter Power Supply: 2 x 1.5V AA Alkaline Battery
Receiver Power Supply: 2 x 1.5V AA Battery
Receiver Playtime: Approx. 25hrs
Operating Range: Approx. 50m