A MAC protocol is required in sensor networks to coordinate the sensor nodes' access to the shared medium. Designing power efficient MAC protocols is one of the ways to prolong the lifetime of the network. In addition to energy efficiency, latency and throughput are also important features for consideration in MAC protocol design for sensor networks. In this paper we try by analysis and simulation to find the best model of radio channels that will be effective and suitable for WSN by evaluating the performance of different radio channels in terms of Energy efficiency, Latency and Throughput using a probabilistic wireless sensor network simulator called Prowler.