This simple, affordable kit includes a wireless doorbell button plug-in receiver that can alert you to the doorbell through flashing lights and/or adjustable chime with up to 1,000 ft. range. Features Long range wireless transmission up to 1,000 ft. (direct line of sight). Each receiver can pair with a total of two (2) transmitters. Receiver has three (3) operating modes; a) chime only, b) flashing strobe only and c) chime flashing strobe. Eighteen (18) available chimes to choose from; can set different chimes for different transmitters to distinguish which transmitter sent the signal. Bright Flashing LED light has two (2) flashing patterns; a) slow b) fast; to distinguish the transmitted notification. Loud and clear sound, up to 90dB. Operating temperature: 32F to 104F. Low battery indicator illuminates when battery in paired push button (or another transmitter) is weak and needs to be replaced. 1-year Manufacturer?s Warranty. Feature Details Brand Krown Mfg part # DBKIT360 Color White Weight (lbs) 0.5 Battery operated? Yes (batteries required) Batteries included? Yes Battery details (1) CR2032 Battery What's included? (1) Push-button doorbell transmitter, (1) Sidekick Receiver, (1) Mounting bracket hardware, (1) CR2032 battery System Krown LookOut Alert Type(s) Vibration Flashing Light Loud Audible Low Vision / Deaf-Blind No Yes Yes No Transmitter / Receiver Transmitter(s) and Receiver(s) Alert Trigger(s) Baby Cry Carbon Monoxide Mobile / Smartphone Doorbell / door knock Motion Pager / SOS Phone / VP Smoke / Fire Sound Severe Weather No No No Yes No No No No No No Range (ft) 1,000 Expandable Yes Portable No Battery backup No USB charger No