1 Set New DC12V Relay Multi Functional 8CH wireless RF Remote Control Switch
If You Keep Pressing The 1 Key And Don' T Release It, The Relay Will Remain On. When You Release It, The Relay Will Turn Off. Self Locking Interlock T+L: 1/2/3/4 Way Self-Locking, 5/6/7/8 Way Interlocking.