diff --git a/src/main.c b/src/main.c
index c3a85a2..446806f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,6 @@
 #include "libusb_wrapper.h"
 #include <stdio.h>
+#include <string.h>
 
 int main(int argc, char *argv[]){
 	printf("Hello World :-|\n");
@@ -15,8 +16,25 @@ int main(int argc, char *argv[]){
         }
         else if(strcmp(argv[1], "demo4.2") == 0){//if 4.2
             printf("\e[91mDemo 4.2\e[39m\n");
-            //displayDeviceEndpoints(Ourdevice);
-            //else
+
+            if(argc > 3){
+                uint16_t vendor_id;
+                uint16_t product_id;
+                sscanf(argv[2], "%hu", &vendor_id);
+                sscanf(argv[3], "%hu", &product_id);
+
+                libusb_device_handle* handle;
+                handle = libusb_open_device_with_vid_pid(context, vendor_id, product_id);
+                if(handle != NULL){
+                    printf("Show endpoints of VID:%hu;PID:%hu\n", vendor_id, product_id);
+                    displayDeviceEndpoints(NULL);
+                }
+                else{
+                    printf("Error while getting handle of VID:%hu;PID:%hu\n", vendor_id, product_id);
+                }
+            }else{
+                printf("Error, need VID and PID\n");
+            }
         }else{
             printf("Wrong command\n");
         }
--
libgit2 0.21.2