ITEM NAME:Dc-Dc 9V 12V 19V To 5V Usb Step Down Module Board Buck Power Supply Charger G6E3 Dc-Dc 9V 12V 19V To 5V Usb Step Down Module Board Buck Power Supply Charger G6E3 Operating Temperature:-40 ~+ 85 Celsius.Dissipation Power:none. 1 USB Step Down Module. Model Number:Step-down Module. Load capacity:Maximum 3A, can 1.5A long running. Application:Power source.