diff --git a/content/hardware/07.opta/opta-family/opta/tech-specs.yml b/content/hardware/07.opta/opta-family/opta/tech-specs.yml
index c3903b692e..64958ac3e0 100644
--- a/content/hardware/07.opta/opta-family/opta/tech-specs.yml
+++ b/content/hardware/07.opta/opta-family/opta/tech-specs.yml
@@ -8,6 +8,7 @@ Microcontroller:
   Cortex-M7 core: Up to 480 MHz
   Cortex-M4 core: Up to 240 MHz
 Input:
+  Max input Voltage: 10 V
   Configurable digital / analog (0-10V) input: 8
 Relays:
   Nº of relays: 4