Wireless Doorbell, AFUNTA Newly Deisgn LED Indicate Plug in Wireless Doorbell With 4 Adjustable Voice Level and 52 Chimes,Kit Include 1 Bell and 2 Receivers(US) LONG OPERATION DISTANCE-We made this product with our unique remote transmission, which allow this doorbell come to a long distance operation up to 300m in open air and 150m in your house. 4 ADJUSTABLE VOICE LEVEL AND 52 CHIMES-Compared with traditonal doorbell,AFUNTA wireless doorbell offer your more chioce to make it your own individual style. LED LIGHT INDICATOR-Blue LED flashes design together with the bell sounds reminds you of a visitor,it's considerate for families with elders and children. EASY INSTALL OF THE TRANSMITTER-The transmitter with screws set and self adhesive tape,can be fixed to the doorframe with screws, or attached by adhesive tapes. APPLIED AS A EMERGENCY SIGNAL TRANSMITTER-You can install this transmitter in the rooms of elders, when there is an emergency, they can inform youngers by pushing the key.