- New high output speaker amplifier with volume adjustment POT - Microphone volume adjustment POT - 24V talk battery - 20Hz ring generator (3.0 REN ring load maximum) - Selectable number of rings (2 3 10 or 30) - Extended operating temperature range: -15 degrees F to 130 degrees F - Compact 45 degree terminal strip for easy wiring - Optional Enhanced Weather Protection (W1000-EWP)