Famili FM505BB Portable Wireless Doorbell Door Chime and Push Button, Flashing Indicator Within 330 Feet Range with 16 Sound &ndash; Black Ranges up to 330 ft/100 meters so you won't miss anyone ringing your doorbell no matter where you are in your house/backyard 3 Modes for different situations; Doorbell Tone Only, Tone and Flashing Light, Quiet Alert with Flashing Light 16 Chime Tones; Adjustable sound volume, Built-in stereo speakers for a higher quality sound. Easy to set up, Lightweight, Sleek, Dust-proof design 1 Year Customer Satisfaction Guarantee (batteries included)