diff --git a/backend/src/utils/validation.js b/backend/src/utils/validation.js
index a261255..fafede7 100644
--- a/backend/src/utils/validation.js
+++ b/backend/src/utils/validation.js
@@ -93,6 +93,10 @@ const userProductSchema = Joi.object({
     Joi.object({
       id: Joi.number().optional(), // For existing settings
       equipmentId: Joi.number().integer().positive().optional(), // Link to user_equipment
+      // Equipment details (for display purposes)
+      equipmentName: Joi.string().max(255).optional(),
+      equipmentManufacturer: Joi.string().max(100).optional(),
+      equipmentModel: Joi.string().max(100).optional(),
       // Legacy fields for backward compatibility
       spreaderBrand: Joi.string().max(100).allow(null, '').optional(),
       spreaderModel: Joi.alternatives().try(