default OEM web port

http://host:1158/em/console/


OEM license 

Database Diagnostics Pack
Automatic Workload Repository
ADDM (Automated Database Diagnostic Monitor)
Performance Monitoring (Database and Host)
Event Notifications: Notification Methods, Rules and Schedules
Event history/metric history (Database and Host)
Blackouts
Dynamic metric baselines
Memory performance monitoring

Database Tuning Pack
SQL Access Advisor
SQL Tuning Advisor
SQL Tuning Sets
Reorganize Objects

Configuration Management Pack
Database and Host Configuration
Deployments
Patch Database and View Patch Cache
Patch staging
Clone Database
Clone Oracle Home
Search configuration
Compare configuration
Policies