USB Portable Doorbell, easy installation with plug and play. - Type: Wireless USB Doorbell - Size: 56mm x 54mm x 22mm (Receiver), 70mm x 43mm x 30mm (Transmitter) - Features: Plug and play, no-wire installation [Remarks] Reacts up to a distance of 150m. 5-level, 60-adjustable music can be played. Can be used immediately by connecting the USB part to a dedicated adapter (sold separately). 15 ----------------------------- Thank you for viewing! (*ノ´O`*)ノ Please read the profile before purchasing★ ◆ Brand new! ◆ Instant purchase OK! ◆ We handle other one-of-a-kind products, so We would be happy if you could take a look♪ #sunumama product list