Football referee with earphone intercom

Consist of 1 master phone, 3 extension phones,  communication for four persons.

Application scope

1,Working-yard overhaul: Power grid and equipment maintenance, line construction, mining building site, etc.. real-time communication.

2,Repair site real-time communication.

3,Secure communication, digital wireless FM Duplex intercom

4,Industrial wireless meter reading

5,Remote control of safety and production

6,Communication in construction fields

7,Communication for race in open land

8,Traning for football, race and so on

Technical Parameters

Micro wireless group radio technical specification  

1. A single master and one (or more) extension consists of a set, simple operation. In line with the provisions of the Ministry of information industry. 

2. Uses the 2.4GHz public band: 2402~2483.5Mhz. 

3. Use adaptive frequency hopping, AHF, With the channel change mechanism

4. Transmit Power: 19dBm, receiver sensitivity-105dBm

5. Sky wireless transfer rate: 2Mbps

6. High AD sampling, 8bit accuracy, 8K sampling rate

7. Frequency range: 300Hz~3.0KHz

8. Micro wireless group radio. A number of group-host, you can cover all group information to other groups from the machine.

9. The main chip high-speed ARM core, for the majority of voice synthesis operations.

10. Communication distance: Open extension 700 meters around the host effectively.

11. Earphone: ¢ 2.5 connector ear plugs, ear hook headset.

12. Extension phone: DC 3.7V 200mAH li-ion battery

      Master phone: DC 7.2V 150mAH li-ion battery