2 way LCD DIY car alarm for only S$150! No messy wire installation needed! New Concept! Main unit & siren works wirelessly! Works on monitoring pressure inside car when doors or windows are opened! Alert by LCD remote with vibrating function! For more info, please refer to our website at http://sdcorp.tripod.com. We are an importer & exporter of various range of mobile phones as well as car / bike accessories. Feel free to call me at 96331642 for any enquiries!