two way car alarm system, Super long distance, up to 5000m, Rechargeable 2 way LCD transmitter, FSK tchnology. two way car alarmauto alarm system / car secunity systemTwo way Alarm systemsMain features:*Super ... ~125dB G.W: 17kgsQTY: 10pcs/CTNMeas: 52.5x50.5x37.5cm 2 way car alarm system R-8681 for super long distance