The short-time-consumption melting and hot pressing processes were used to synthesize n-type and p-type Bi-Sb-Te thermoelectric materials. The synthesis materials were characterized and used for the module fabrication. The aluminium substrate was used instead of alumina substrate because it is easy to cut and to avoid fragility of the module. The performance of 20 x 20 mm2 prototype thermoelectric module consists of 7 pairs of n-type and p-type Bi-Sb-Te thermoelectric materials was investigated and then compared its performance to 40 mm x 40 mm commercial module. The output power densities as a function of temperature difference across the devices and open circuit voltages from the module are reported.