1、Powerful Penetration: Intelligent and upgraded chip with strong penetration, floors 1 to 8 floors are available, bringing you reliable use results. 2、Intelligent Design: Smart and user friendly design with intercom light and power light display to meet your usage needs. 3、Stable Signal: The working distance in the open area is about 1000 meters, the signal is stable and will not interfere with other devices in your home or neighbors. 4、Performance: When the outdoor doorbell is working normally, press 5 times a day, a call for 2 minutes, and can work for about 6 months, indoor doorbell work for about 1 week. 5、Application: Voice intercom doorbells can be used for home, hotel, villa, factory, hospital, and is your necessary intelligent call system.