Panasonic Premium Telephone System brackets Base Unit Standby Power Consumption:

Base Unit Standby Power Consumption: 0

it also operates on AC and battery power

Professional Jab head Design

Sound is your competitive advantage with the S1 speaker drivers

It also has a speakerphone

Panasonic Premium Telephone System brackets Base Unit Standby Power Consumption:About this item Wall mountable corded base unit with large white backlit display; 2 Handsets with backlit display and illuminated keypad for easy use Automated Call Block requires unknown callers to press 1 to connect, screening out machine calls; use Telemarketing Call Block to require callers to say their names before you answer Answer incoming calls with Voice Command to talk on the speakerphone; 2 Way Recording button ensures you don't miss