Wireless Visual Flashing Strobe Alert with Doorbell Kit For The Hearing Impaired Portable, Visual and audible alert, 4 sound options or strobe, or both. Great for outdoor events, remote locations, take it with you anywhere, camping/RV, backyard, office. 150 foot operating range let's you walk around with it anywhere you need. Clay colored, Uses 3 AA batteries (not included) for the alert and 1 CR2032 battery for the button(included)