Asahi Denki Battery-free wireless chime set

Manufacturer part number: "WC-S6041AC" Size and weight Weight of receiver: Approx. 88g Waterproof push button transmitter: Approx. 89g (excluding suction cup) comment ○It is a wireless type that does not require wiring, so it is easy to install! ○The receiver simply needs to be plugged into an outlet, and the transmitter generates power when pressed, so no batteries are required. ○The push button is waterproof, so it can be used in wet areas such as bathrooms and toilets. The radio wave has a line-of-sight range of approximately 90m. It is ideal for use as a paging or alarm device in homes, stores, and offices. ○There are approximately 1 million possible ID codes (identification codes), so there is no need to worry about interference. ○8 types of notification sounds to choose from. Materials and raw materials - standard 1 set Standard details [Receiver] Power supply: AC100V 50/60Hz External dimensions (approx.): Width 57 x Height 106 x Depth 39 mm ○Volume: Approx. 85dB/50cm *At maximum volume ○Frequency: 314.8MHz (specific low-power device) ○ID code: Approximately 1 million Radio wave reach: Line of sight approx. 90m Operating temperature range: 0℃ to 40℃ ○Accessories: 1 suction cup mounting sticker [Transmitter] Power source: Generates power by pressing (no batteries required) External dimensions (approx.): Diameter 75 x Height 42 mm (excluding suction cups) ○Protection rating: IP67 Dustproof, waterproof and water-resistant