Reliance Controls Pro/Tran2 - 30-Amp (120/240V 10-Circuit, 30A DP) Outdoor Transfer Switch w/ Wattmeters & Inlet. Model: RA310A. (8) $414.99. Factory-Direct. View Details. Compare. Reliance Controls Pro/Tran 2 - 20-Amp (120/240V 6-Circuit) Outdoor Transfer Switch w/ Wattmeters & Inlet.