Wireless communication Arduino RF - the instructions?

Are these correct? i want to buy Wireless communication Arduino RF.


Receiver module parameters

Product Model MX-01V
Operating voltage: DC5V
Quiescent current: 4mA
Receiving frequency: 403MHZ
Receiver sensitivity:-105DB
Size: 30 * 24 * 7mm
An extra antenna is needed, please use spiral 50Ω a quarter wavelength antenna

please help

Tapsi Sarkar