Outdoor Use: Transmitter with super rating IP55 waterproof,can be used when cold or rain. With CE, FCC, ROHS certified.

Long Range Transmission: Operating range from 500 to 1000 ft((in an open air, no obstacles).

Ring tone: With over 50 different ring tones and four levels of adjustable volume.

Installation: No batteries required for receiver, simply plug it into a power supply (UK Standard); And the ring tone can be set different for each transmitter button.

Applicable environment: Can be used for big house, office, hotel service or assisted living.