Output: Switching Transducer Theory: Hall Effect Sensor Model Number: Y25-T12V Type: Humidity Sensor Use: Position Sensor Color: As shown Material: Plastic Package Contents: 2 Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.