... by battery, install the battery and switch the power controller to "BATT"Power supply by charger, insert the round plug of charger ... connect the other end with the DC power. And then turn the power switch of power controller to "DC 3V"Recharge the nicke ... temperature5600K±300KRing 48 Contains: Macro ring head 1PCS Charger 1PCS Power controller 1PCS Adapter ring (6PCS) 49mm, 52mm, 55mm, 58mm, 62mm, ...