Thank you for viewing. Please refrain from price negotiations and those who are overly concerned about details. To keep the price down, the item will be removed from its original packaging and repackaged for shipping via Takkyubin Compact. Thank you for your understanding. Receiver + Push Button Transmitter Set EWS-S5030 Easy to install because it's a wireless type that doesn't require wiring! You can also add more transmitters and receivers to suit your needs. (Up to 8 transmitters can be registered to one receiver.) You can add as many receivers as you like to one transmitter. The radio wave range is approximately 120m in a clear line of sight. Ideal for calls and notifications in homes, stores, and offices. With approximately 250,000 ID codes (identification codes), there is no need to worry about interference. The receiver and transmitter will notify you with a lamp when it's time to replace the batteries. 20 different notification sounds that you can set to your liking. You can set different sounds for each transmitter, so you can identify the transmitter by the sound. The LED lights up when it gets dark, and the push button is rainproof, so you can see its location. *Avoid installing in places where large amounts of water (such as torrential rain or typhoon rain) can directly hit it. EWS-S5030 Specifications Radio wave range: Approximately 120m in a clear line of sight Frequency: 313.625MHz (specified low-power equipment) ID code: Approximately 250,000 Operating temperature range: 0℃ to 40℃ Receiver Power supply: 3 x AA alkaline batteries (sold separately) or DC4.5V center plus Compatible plug: Outer diameter Φ5.5mm, inner diameter Φ2.1mm (when using a separately sold AC adapter) Battery life: Approximately 1 year (when used 10 times a day, volume 4, high-pitched ping-pong sound) *When using alkaline batteries *Battery life may be shorter depending on battery performance and usage conditions. Volume: Approximately 88dB/50cm External dimensions (approx.): Width 142 x Height 80 x Depth 29 (mm) (maximum value) Weight: Approximately 138g (excluding batteries) Accessories: 2 mounting screws (Φ3 x 20mm) Push button transmitter Power supply: 2 x coin-shaped lithium batteries CR2032 (sold separately) Battery life: Approximately 2 years (when used 10 times a day) *Battery life may be shorter depending on battery performance and usage conditions. External dimensions (approx.): Width 40 x Height 91 x Depth 19 (mm) (maximum value) Weight: Approximately 38g (excluding batteries) Waterproof specification: IPX4 splash-proof Accessories: 2 mounting screws (Φ3 x 20mm), 1 double-sided tape