Bosch Wi-Fi Thermostat, 45 to 99 deg F Control, +/- 1 deg F Differential, G, Y, Y2, W/E/AUX, O/B/W2, H/DH Terminal Designations, 18 to 30 VAC/5VDC, 24 VAC, 6 A Power Source, Wall Mounting, 5.2 in W x 0.67 in D x 3.07 in H, Import