It does not have auto detection function directly supply power to devices by force as soon as you connect them,powered device or poe splitter must conform to stard IEEE 802.3af/at,the same time your powered device must support poe pin 4/5(and),7/8(-)midspan.Power Input = Power Outputchannels,Take 4Port POE,injector as example:DC48V 4A Input = DC12 V1A Output per channel,DC48V 2A Input = DC48V 0.5A output per channel.If you only use 3 of 4 channels,DC12V3 A input = DC12V 1A output per channel.Please select according your device power consumption,in order to stable running,the total power consumption must be lower than the total power supply.This POE adapter apply for IEEE802.3af/at stard POE powered devices like , other IP cameras,or being equipped together with IEEE802.3af/802.3at stard poe splitter for non POE devices.Led:Indicate the working state,Lan port:8ports in RJ45(data in),8port poe RJ45(dataandpower out),Data in:PC/Hub/Switch/Router,etc.Working temp:0-and40 Celsius.Working humidity:20 -90% RH non-condensing,Storage temp and humidity:-20-and85 Celsius,10-95% RH,weight:120gColour:Black Material:ABS and electronic componentsProduct size:104.73.1cmPackage Contents:1 4 port POE hub1 cartonOnly the above package content, other products are not included.Note: Light different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.