Doorbell radio set: 1 receiver and 1 transmitter, no batteries required and no annoying cables. IP44 waterproof push button is suitable for outdoor/outdoor use, as a garden bell. Digital Code System: When the bell button is pressed, a radio signal is sent to the receiver. Different codes on the same frequency, saving you the worry of possible interference with your neighbors' system. Long range: A sufficient radio range (280m / 1000ft in open area) is perfect for your home, the signal can Penetrate obstacles very well. Either you are cooking in the kitchen or weeding in the garden, this wireless radio bell will inform you in time. never miss a visitor! Easy InstallationSimply plug the receiver into a power outlet and install the push button on the wall or door frame with included screws or adhesive tape. Blue LED flashes when someone visits. Various tones & volume: 36 different ringtones from classic to well-known melodies are available for you to choose from. Adjustable volume from 25db to 85db can be adjusted in 4 levels