RL Wireless Door Chime, RL-3718AA

This door chime announces visitors with a clear tone loud enough to be heard across a flat or a small shop. Wireless models pair a push button at the door with a chime unit indoors, so no cable has to be run through the wall. Keep the push button out of direct rain, and note that the stated wireless range is measured in open air — walls, metal doors and reinforced concrete will reduce it in practice.