Description: Apply to PBX, photocopiers, washing machines, refrigerators, cameras, Xiaoduwangui, door, window magnetic, electromagnetic relays, electronic weighing, level meter, gas meter, water meter, etc. have been well used. Imported normally open reed The comparator output signal is clean, good waveform, driving ability, more than 15mA. The working voltage of 3.3V-5V The output format: digital switching outputs (0 and 1) A fixed bolt holes for easy installation Size: 40 x 15 x 15mm Package Includes: 1 Piece Reed Sensor Module Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !