Features: 2-zone capabilities where each zone is independent and has its own serial number Zone 1 - One of two high-sensitivity reed switches (magnet included) Zone 2 - Universal transmitter input (N.O./N.C.) Wireless range in a typical residential environment: - 35m (115ft) with MG6160 and MG6130; - 70m (230ft) with MG5000, MG5050 and RTX3 Low battery and signal transmission LED Available in 433MHz or 868MHz Anti-tamper switch Dimensions: 12.4cm x 4.5cm x 3.3cm (4.9in x 1.8in x 1.3in)