[Dimension] - Cable Length: 50cm/19.7"; Total Size: 105 x 37 x 9.7mm, 105 x 15.7 x 15.3mm (L*W*H)
[Material] - The magnetic switch alarm is with durable zinc alloy housing for better rust resistance
[Normally Closed] - N.C. means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separates, the circuit is not conductive ( light off )
[Applications] - The Rolling Door Contact is designed for use with window and door alarm systems, such as a garage, shops, etc.
