ZKD610C is a smart carbon monoxide alarm adopts high quality sensor, combined with advanced electronic technology and sophisticated process, with the advantages of stable operation and long service life. ZKD610C is certified by CE, EN50291, ROHS and Fire Certification, reliable, safe and reliable. FEATURES HIGH SENSITIVITY 1. MCU processing and SMT Manufacture Technology 2. High reliable electrochemical sensor. 3.When the concentration of CO reaches the alarm setting value, the detector emits an audible and visual alarm indication. DIGITAL DISPLAY Displays the level of carbon monoxide the unit is sensing. Shows CO level in PPM. HUMAN VOICE ALARM Different from other detectors, ZKD610 can be prompted by a human voice, making it instantly understandable to the user. AUTOMATIC SELF-TEST FUNCTION 1.This CO alarm has automatic self-test function to detect ant failure of hardware, which is performed about every 1minute in normal standby status. 2.Green: power indicator; Red:alarm indicator, flashing 100ms on/100ms off; Yellow:fault indicator, once detect the fault or failure, the buzzer sounds 2 times per 1s.