... Dy Model 888F: 2-way LED transmitters + super long distance car alarm system Main features: 1) Dynamic colorful LED transmitter 2) Paging ... 1,000 meters 4) FSK technology, high stability and long distance 5) Sound, vibration, flashing LED indicate the vehicle status ... -to-understand icons 4) FSK technology, high stability and long distance 5) Sound, vibration, flashing icons indicate the vehicle status ...