Pyle PWD202 4-Button Vehicle Security System Vehicle security system with pair of 4-button keychain transmitters with labeled rubber keys 6-tone 125 dB car alarm siren; built-in relays for starter disable and parking lights Dual-stage shock sensor detects light impacts to vehicle's side; LED emergency override switch Remote panic siren sounds for 30 seconds; ignition lock automatically locks doors after car turns on Valet mode disarms alarm functions; car locator function; 1-year warranty