SOAIY Long Range Water-resist Wireless Doorbell Kit, 1 Plug In Receiver 1 Remote Push Button, Emergency System for The Aged, 1000 Feet Operating Range,36 Optional Stereophonic Music Chimes [LONG WIRELESS RANGE]- The kit support 1000ft/280M open area transmission range. No matter you put the receiver upstairs or back houses, you will hear the clear nice sound and will not miss any guests. [PROTECTIVE DESIGN] The transmitter uses a IP44 water-resistant and dustproof design, long life guaranteed. Works beautifully in extreme winter weather. [MELODY AND VOLUME OPTIONAL]  4 levels of adjustable sound volume. If you dont want to wake up your baby when sleeping, you can set the volume to 0 and the LED indicator light will remind you when there is guest coming .There are 36 chime tones, from the traditional Ding Dong to various well-known melodies. [MULTIPURPOSE AND SMART MATCH DESIGN] - Special design of auto-learning codes helps to prevent interference from other users or appliances. But if you want to use 2 our transmitters with 1 receiver, it can be auto match easily. Highly portable wireless design lets you take it with you to the patio, your garage workshop, or your home office. Can be used to send emergency massage or care for the old or patients. [EASY TO INSTALL] - Push button can be fixed to the door frame with the screws provided, or attached to the wall using double-sided adhesive tapes outlet in your home; ACplug-in) door chime can be plugged into an electrical outlet in your home or office.