In the data sheet, it says:
Power Supply:12 VDC ± 25%, PoE (802.3af Class3)
Power Consumption:12 VDC, 0.5 A, max. 5.5 W
PoE (802.3af, 36V to 57V), 0.2 A to 0.1 A, max. 7 W
data sheet here: DS-2CD2045FWD-I 4 MP IR Fixed Bullet Network Camera-Hikvision