... high voltage security alarm 3. easily assembled 4. metal material 5. manufacturer Electronic Security Fence SystemMaterial: low carbon steel wire, ... function, directly show the voltage in the panel, user gets it clearly♥ 5 LED indicated lamp, display the working mode clearly ... open/close, DC12V, RS 485 conjunct function when alarm♥ User can set alarm delayed triggered time freely.♥ Tamper function, when ...