ELPA Easy-to-Use Intercom CDS-600-2P

ELPA

Power Supply: 4 x AA alkaline batteries (sold separately) or DC 6V 200mA center positive. Compatible Plug: Outer diameter Φ5.5mm, Inner diameter Φ2.1mm (when using separately sold AC adapter).

Battery Life: Approximately 2 years (based on 10 calls of 10 seconds each per day, at high volume). *Battery life may be shorter depending on battery performance and usage.

Call Method: Telephone-type simultaneous call

Ringing Method: Electronic tone (prrrrrrr)

Wiring: 2-wire (polarized)