The Tecknet Wireless Doorbell Kit provides a reliable way to know when someone is at your door, featuring a transmitter button and two plug-in receiver speakers. This system operates on a 433.92 MHz frequency with a range of up to 100 meters in open spaces, making it suitable for homes with multiple rooms where you might need an alert in different areas. You can choose from 62 different melodies and four volume levels reaching up to 80 dB, with the receivers remembering your preferred settings even after a power cut. Designed for easy setup, the transmitter attaches with double-sided adhesive tape and runs on a 12V battery, while the receivers simply plug into AC outlets. The compact units are built to withstand the elements with an IP44 rating, ensuring they remain dust-proof and water-resistant in temperatures ranging from -10°C to +45°C. An integrated LED indicator provides a visual cue alongside the sound, and the system is designed to emit no electromagnetic radiation, offering a safe and practical solution for any household.