This dispenser is the ideal solution to monitor any medication or vitamin schedule. This will allow caregivers the freedom from worry-free and help make sure that medications are taken properly and on time. The 28 compartment tray can hold up to 18 aspirin sized pills per compartment. The Pill Dispenser is programmable for up to 6 daily alarms. The alarms sound for 30 minutes or until medications is dispensed. The dispenser comes with 6 dosage rings. This allows for being able to pick the right ring for the appropriate dosage amount. Completely portable. The unit retains program settings when changing batteries.