Drok 5V Regulator, 5Pcs Mini Voltage Reducer Dc 4.5 24V 12V 24V Step Down To 5V Buck Converter Board 3A Volt Step Down Transform Environmental Sensors * Power over Ethernet (PoE):

* Power over Ethernet (PoE): Compatible with PoE

Your Doorbell Would Face In The Upward Direction

Elegant Shape And Classic Colors

Material: Metal Folding

Or A Dell Chromebook Battery 3180

Drok 5V Regulator, 5Pcs Mini Voltage Reducer Dc 4.5 24V 12V 24V Step Down To 5V Buck Converter Board 3A Volt Step Down Transform Environmental Sensors * Power over Ethernet (PoE):Parameters: Input Voltage: Dc 4. 5 24V Output Voltage: Integrated Adjustable And Fixed Output (Adjustable Range Is 0. 8 17V, Fixed Output Are 1. 8V, 2. 5V, 3. 3V, 5V, 9V, 12V That Can Be Chosen On The Back Side) Output Current: 3A Max (Please Enhance Cooling Work When It Is Full Load); When Real Tested Input 12V And Output Is 1. 5A, No Need To Add Special System. Conversion Efficiency: 97. 5% (Highest) (6. 5V To 5V, 0. 7A) Switch Frequency: 500Khz