AbstractFree space optics (FSO) communication is a short-distance wireless communication system. It can be used where optical fiber cables cannot be implemented. In FSO, the energy beam is accumulated and transmitted through space instead of guiding through an optical cable. FSO communication provides data at a rate of Gbps; it is highly secure because it uses narrow beam to transmit data from transmitter to receiver, uses license-free operation, has no electromagnetic interference and has quick installation. This paper gives an overview of performance of FSO communication with environmental attenuation.