ELPA Wireless chime set that does not use batteries for calls, stores, offices, nursing, piezoelectric type WC-S6040AC

●Wireless type requires no wiring, so installation is easy! The receiver is simply plugged into an outlet, and the transmitter generates electricity by pressing it, so no batteries are required.
●The range of radio waves is approximately 90 meters in line of sight. Ideal for calling and announcing in general homes, stores, and offices.
●There are approximately 1 million ID codes (identification codes), so there is no need to worry about interference.
●8 types of notification sounds that can be set to your preference ●Rainproof type push button that can be used outdoors *Avoid installing it in a place where it will be directly exposed to large amounts of water (such as heavy rain or typhoon rain).
●Volume: Approx. 85dB/50cm *Volume (at maximum)
●Frequency: 314.8MHz (Specified low power equipment)
●Operating temperature range: 0 degrees to 40 degrees