– Color: Blue – Material: PCB – Open reed switch – Comparator output, clean signal, great waveform, and strong driving ability – More than 15mA – Working voltage: 3.3V~12V – Output format: digit switch output (0 and 1) – Fixed bolt hole for easy installation – Using a wide voltage LM393 comparator – Applies to PBX, photocopiers, washing machines, refrigerators, cameras, disinfection cabinets, doors, window magnetics, electromagnetic relays, electronic weighing, level meters, gas meters, water meters, etc.