Supvox door bell without wire helps families, visitors, and office users signal from different rooms. The calling bell wireless design provides an audible alert without fixed wiring. Use the remote bell for home wireless at entrances, reception areas, bedrooms, kitchens, or small offices. Keep the transmitter near the entry point and place each receiver where the alert can be heard. Two receivers help cover more than one room, while the ringtone selection supports different listening preferences. The IP55-rated housing is designed for sheltered outdoor placement and everyday indoor use. Install the transmitter on a clean, dry surface and keep receivers within the usable signal area. Replace batteries when the alert becomes faint, and wipe the housing with a soft, dry cloth. Avoid immersing any component in water.