The Unitec wireless gong is a practical and reliable solution for acoustic notifications at doors. This electronic device operates via radio and offers a range of up to 80 meters under optimal conditions. With a frequency of 433 MHz, the wireless gong ensures a stable connection. It is powered by batteries, allowing for flexible placement without the need for wiring. The wireless gong is not expandable with additional transmitters or receivers and is not compatible with smart home systems. With a maximum volume of 80 decibels, it ensures that you can be alerted from a greater distance. Made in China, the wireless gong is a simple and effective solution for anyone looking for an uncomplicated doorbell and intercom system.