The Olimpia TF 400 Door/Window Contact Set is a reliable and easy-to-install security solution for your home. This set includes four wireless door/window contact sensors that are designed to trigger a loud alarm when a door or window is opened. The alarm is 90dB (80 dB(A)A-weighted) loud. The sensors are battery-powered (12x LR44, included), and feature easy construction. Perfect for protecting your windows and doors.
