diff --git a/libosdp/src/pdinfo.rs b/libosdp/src/pdinfo.rs
index a734d6a..ae778bc 100644
--- a/libosdp/src/pdinfo.rs
+++ b/libosdp/src/pdinfo.rs
@@ -81,8 +81,8 @@ impl PdInfoBuilder {
     /// Set PD ID; Static information that the PD reports to the CP when it
     /// received a `CMD_ID`. For CP mode, this field is ignored, but PD mode
     /// must set
-    pub fn id(mut self, id: PdId) -> PdInfoBuilder {
-        self.id = id;
+    pub fn id(mut self, id: &PdId) -> PdInfoBuilder {
+        self.id = id.clone();
         self
     }
 
@@ -92,6 +92,16 @@ impl PdInfoBuilder {
         self
     }
 
+    /// Set multiple capabilities at once
+    pub fn capabilities<'a, I>(mut self, caps: I) -> PdInfoBuilder
+        where I: IntoIterator<Item=&'a PdCapability>,
+    {
+        for cap in caps {
+            self.cap.push(cap.clone().into());
+        }
+        self
+    }
+
     /// Set Osdp communication channel
     pub fn channel(mut self, channel: Box<dyn Channel>) -> PdInfoBuilder {
         self.channel = Some(channel);