Wireless Smoke Detector Compatible For Home Alarm Security With Sonoff Rf Bridge Product Options: Make stronger strobe and wireless alarming Simple to put in, no want to trying out The chic design does no longer soak up mud Overhead mild guide, LED indication Built-in top volume buzzer, strobe alarm on-web site. Stay the device sensitive and longer life Self-trying out for keeping long-term stable operation Super-long standby life Adopt photoelectric two transmissions one receiver a two-manner scattering patent technology Low battery alert, the system will remind the user to switch battery when the voltage underneath 6.8v. Simple to scrub and alter the battery Make stronger wireless transmission, stronger competitive. Package includes: 1 x Wireless Smoke Detector Please understand: 1. As a result of the adaptation between other monitors, the images won’t mirror the real color of the article. 2. Please permit the slight distinction in product sizes As a result of manual measurement.