Universal transmitter and supervised radio magnetic contact. Input for normal closed or open contact. It incorporates a magnetic contact, with two possible positions and a tamper. It works with 1 lithium battery of 3 V type CR123A, duration 3-5 years. European frequency 433 MHz. Self-learning programming. Dimensions: 102 x 32 x 32 mm. Available in brown color upon request, ref. NX451N-I.