Fangrui Product Details Compatible Models - Compatible With T100 Series Models: 1a219, 1a220, 1a573, 1a850, 2a208, 2a209, 2eo21, 2eo22, 2eo23, 2eo25, 2e214, 2e258, 2e259, 2e351, 2e352, 2e353, 2e354, 4a213, 4eo23, 4eo24, 4eo25, 4eo26, 6x757, 6x759, 6x760, 6x767, 6x768, And 6x769. Installation Purpose - Compatible With The For T100 Series, Using 1 Silver On Release And 1 Gold Off Release, Also Compatible With The For Intermatics Clock: T101r, T101m, T104m, T104r, T101, T102, T103, T104 And 102-20, 104-20, For All Other Models: Use 1 Silver On Trip And 1 Gold Off Trip. Compatible With 156t3492a Wh Series 156t1961a. Easy To Install - Loosen The Setting Screw On The Trip Device, Slide The Trip Device Onto The Timer Dial, Turn It On/off At The Required Time, Then Tighten The Setting Screw, Making Sure The Time Under The Current Time Hand Is Correct. Wide Range Of Applications - Our Alternatives Are Not Only Suitable For The Following Time-switch Release, But Also For Other Indoor Equipment As Required. Simple And Convenient, Suitable