Battery-free wireless chime set WC-S6040AC 1 piece

It's a wireless type that doesn't require wiring, so wiring is easy! Just plug the receiver into an outlet, and the transmitter generates power by pushing it, so no batteries are required. The radio wave has a line-of-sight reach of approximately 90m, making it ideal for paging and alerting in homes, stores, and offices. There are approximately 1 million possible ID codes (identification codes), so there is no need to worry about interference. Eight types of alarm sounds can be set to your liking. A rainproof push button that can be used outdoors. *Please avoid installing in locations where it will be directly exposed to large amounts of water (such as torrential rain or typhoon rain). Power supply: Receiver/AC100V 50/60Hz, Waterproof push button transmitter/Generates power by pressing force (no batteries required) Volume: Approx. 85dB/50cm *Volume (at maximum) Frequency: 315MHz (specific low-power device) ID code: Approximately 1 million Radio wave reach: Line of sight approx. 90m Operating temperature range: 0℃ to 40℃ External dimensions (approx.): Receiver/width 57 x height 106 x depth 39 (mm), push button transmitter/width 35 x height 87 x depth 33 (mm) Weight: Receiver/approx. 88g, Pushbutton transmitter/approx. 66g (including mounting holder) Waterproof specifications: IPX4 splash-proof (push button transmitter) Accessories: 2 mounting screws (φ3×14mm), 2 sleeves (φ6×24mm), 1 double-sided tape