Parameters ZigBee Bluetooth Wi-Fi GSM
Range 30m – 1.6 KM 30 – 3000ft 100 – 150 ft 30 - 35 KM
Power Consumption Low Medium High High
Frequency 2.4G 2.4G 2.4G 900 and 1800 MHz
Protocol/ Modulation CSMA / CA, DSSS FHSS  CCK, OFDM, DSSS MS, BTS, BSC,MSC
Cost Low Low High Medium
Table 1: Technical specifications of communication protocols.
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