Fangrui Product Details 1. Dc 8-60v Wide Operating Voltage Range (here Refers To The Control Panel Can Work In This Voltage Range,the Actual Operation Of The Controller Power And Fan Is Together, It Must Be In Accordance With The Fan Power Requirements, Otherwise It Damage The Fan). 2. Dual Temperature Control, In Turn Show The Temperature Of The Two Channels (-9.9to 70.1 Error Less Than 1 3. Fan Low Speed And Temperature Control Zone Are Set By Key, Flexible Control, Set A Large Range, Set The Program After The Save. 4. Can Set The Switch Stop Alarm Function (external Ac Buzzer Long, The Default Off). Operating Voltage:dc8-60v (must Be Equal To The Fan Voltage, If You Use 12v Fan Is Powered 24v Burn The Fan) Operating Current:control Panel Operating Current 35ma (12v) 22ma (24v) Control Capability:no Fan Current Limit, But The Board Fan Interface Pin Current Should Not Be 3a Current,use A Larger Current Fan Please Connect The Fan Power Cord Directly To The Main Power Supply! Control Output Range:-100 (this Is Only