Specifications Details Product code RB921GS-5HPacD-15S Architecture MIPSBE CPU QCA9557 CPU core count 1 CPU nominal frequency 720 MHz Dimensions 140 x 348 x 82 mm License level 4 Operating System RouterOS Size of RAM 128 MB Storage size 128 MB Storage type NAND Tested ambient temperature -40°C to 70°C Powering Details PoE in Passive PoE PoE in input Voltage 12-28 V Number of DC inputs 2 (DC jack, PoE-IN) DC jack input Voltage 9-30 V Max power consumption 13 W FAN count Passive https://www.youtube.com/watch?v=CfQqk_cRils&feature=youtu.be