Fangrui Product Details 5a Overcurrent Protection Module With Button Settings And Digital Tube Display, Can Stably Measure 50hz/60hz Ac Current Digital Tube Display + Button Settings + Power-off Save Settings Relay Passes Voltage Ac220v, Current Ac10a, Frequency 50hz/60hz Overcurrent Setting Range 0.01~5a 5. Output Contacts, 1 Group Of Normally Open + Normally Closed Applicable To Current Measurement, Equipment Protection, Dormitory Overcurrent Protection And Other Occasions Power Supply: 12v Measurement Range: Ac0.01~6a Measurement Accuracy: 0.05a Overcurrent Setting Range: 0.01~5a (the Product Appearance And Printed Words Depending On The Batch, But This Does Not Affect Use) Colour: Blue Material: Pcb Package Contents: 1* Overcurrent Protection Module 1* Current Transformer Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And 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.