Sale!Add to basket MK D3838 Wired Door Chime with Built-in Transformer RM146.30 RM41.12HONEYWELL MK wired door chimes feature a sleek design, and crystal-clear tunes that feel like home. Compatible with all standard bell switch and door push devices, our chimes are easy to install and to upgrade. Their modern aesthetics make the wired door chimes seamlessly blend in with any décor. And you’ll never have to worry about maintenance. Installation is easy. A screwless terminal accommodates one wire and uses double insulation (CLASS II Construction) to protect against electric discharges to ensure your safety.