This is a replacement HD700 WRIST pendant only. The medical alert system is NOT included in this order. The HD700 medical alert system will hold a total of 2 panic buttons. This pendant will need to be Paired to the system when it is received. It will NOT work out of the box without being Paired to the base unit. Here are the pairing instructions 1. Turn power Off. (on Base Unit) 2. Turn power On. (on Base Unit) 3. Within 4 seconds, press and hold the Big Blue Help Button on the Base Unit. 4. Then while still holding down the Big Blue Help Button on the Base Unit, press the Panic Button on the Necklace Pendant or the Wrist Pendant. (In one second, you will hear a small beep) This means the pairing was successful. 5. If you have more than one pendant you should always re-pair both pendants. 6. Turn Base Unit off. 7.Turn Base Unit On. Wait for Red LED on top right of base to stop flashing. 8. Press a Pendant to Activate Alarm. (This is to test the pairing process) This is a replacement HD700 WRIST pendant only. The medical alert system is NOT included in this order. The HD700 medical alert system will hold a total of 2 panic buttons. You can Wear this in the shower for up to 15 minutes The HD700 medical alert system will hold a total of 2 panic buttons. It will NOT work out of the box this must be Paired to the base unit. Battery installed and included Only Works With: Model HD700v (shows HD700V on base)