GoFurther BFXB Portable Wireless Doorbell Kit, 52 Chime Tones, Operating at over 500-feet Range, 1 Remote Transmitter Button and 1 Plug-in Door Chime(AC Receiver) - White Modem design and beautiful external form. Use latest unique technology the wireless distance can reach 1000ft/ 300 meters in open air. Provide 52 chime tones, Four levels of adjustable sound volume for your comfort. Transmitter button is rated IP33 weatherproof and suits for outdoor. Door chime can be plugged into a standard electrical outlet in your home. CE, FCC, RoHS certified.