ELPA Wireless No Installation by Pressing the (ELPA) Battery-Free Chime, Required, Waterproof, Self-Powered Button, WC-S6040AC

[Wireless and Easy Installation] Simply plug the receiver into an outlet, and the transmitter generates power by pressing the button, so no batteries are required. This wireless chime can be used in a variety of situations, including at home or in the care of elderly relatives. [No need to worry about running out of battery] Pressing the transmitter button generates electricity in the coil inside, which then emits radio waves. The chime sounds when the radio waves are received. [Suitable for various occasions] There are 8 types of chimes. The radio wave has a line-of-sight range of approximately 90m. It is ideal for calling and announcing notifications in ordinary homes, stores, and offices. [Rainproof] This push button is rainproof (IPX4 splashproof) and can be used outdoors. Ideal for use at entrances, stores, etc. Product Details: Power Supply: Receiver: AC 100V 50/60Hz; Push-Button Transmitter: Generates power with the force of the button press (no batteries required); Volume: Approx. 85dB/50cm (maximum volume); Frequency: 314.8MHz (specified low-power device); ID Code: Approx. 1 million combinations *Please avoid installing the product in a location where it will be directly exposed to large amounts of water (such as sudden heavy rain or typhoon rain).