Check the listing for details. Wireless Doorbell with 1 Remote Button Operating at over 900-feet Range. Condition: New. Listed at 9.99 USD. Wireless Doorbell with 1 Remote Button Operating at over 900-feet Range with over 36 Chimes, 4-Level Volume, No Batteries Required for Receiver (White) Operating range of over 900-feet/280m in open area. You will always easily informed when someone is calling from outside.4-Level of volume from 20db to 80db, with 36 chimes. You can control the adjustable volume and choose your favorite chime.No batteries need for the plug-in receiver, and the push botton is waterproof for outside use.Easy Installation of transmitter including screws and double-sided achesive tapes.Without electric magnetic radiation, suitable foe pregnant women living environment. Delicate designWireless： Without electric magnetic radiation.Easy Installation.High-grade design.