The Orno OR-DP-BD-157 is a two-tone electromechanical doorbell designed for straightforward surface mounting on indoor walls. It connects directly to the 230V mains supply and includes a built-in step-down transformer that reduces the voltage at the doorbell button circuit to a safe 8V. This eliminates the need for a separate external transformer, simplifying installation.

The BIM-BAM chime produces two distinct tones at 80 dB, audible across a typical residential room. The white plastic housing measures 170×106×50 mm and is finished for standard indoor environments. Volume control is not included; the device operates at its fixed 80 dB output. Connection is wired, and installation is by surface mounting on any standard wall.

Key Features

• Two-tone BIM-BAM electromechanical chime at 80 dB
• Direct 230V mains connection (nominal 230V~, 50Hz)
• Built-in 8V step-down transformer — no external transformer needed
• Surface-mount installation on indoor walls
• Wired connection type
• IP20 ingress protection rating
• White plastic housing

Product Benefits

• The built-in 8V transformer reduces the wiring circuit to the external door button to a safe low voltage, removing the need to purchase and house a separate transformer unit
• The electromechanical BIM-BAM chime produces a familiar two-tone sound that carries clearly through interior walls without needing amplification
• Surface mounting allows the doorbell to be installed without recessing into a wall — suitable for existing buildings where wall modification is not practical
• Direct 230V operation means the doorbell is powered from the standard mains supply without any intermediate power supply
• At 80 dB, the chime is audible in typical residential and small commercial environments without being excessively loud

Technical Specifications

• Model: Orno OR-DP-BD-157
• Type: Electromechanical
• Sound: 2 BIM-BAM tones
• Volume: 80 dB
• Nominal Voltage: 230V~, 50Hz
• Built-in Transformer Output: 8V
• Connection Type: Wired
• Mounting: Surface
• Ingress Protection: IP20
• Colour: White
• Dimensions (H×W×D): 170×106×50 mm
• Volume Control: No

Why You'll Love It

• No external transformer to buy, mount, or wire separately — the built-in unit handles the voltage step-down, keeping installation compact and clean
• The familiar BIM-BAM tone is a standard two-tone chime that is immediately recognisable as a doorbell signal without any configuration
• Surface mounting means the doorbell can be positioned anywhere on an interior wall and relocated later without plastering over a recess
• White housing integrates naturally with standard interior wall finishes in homes, apartments, and shops