ELPA CDS-100 Notification Chime Easy-to-install ELPA intercom for DIY projects, convenient with a remote control. - Brand: ELPA - Model: CDS-100 - Features: Easy DIY installation - LED Indicator: Yes - Operating Range: 20m - 30m - Accessories: Includes remote control - Power Source: AAA batteries (sold separately) I purchased this but never used it. Batteries are not included. Instant purchase is welcome. Thank you for looking.