THE IS300 is fitted with a number of anti-theft devices, including a security coded audio system, laser-milled security key, key lock-in prevention system, valet disable switch for the power boot-release function, (one-stage) keyless remote entry with remote boot-release, an engine immobiliser and a security alarm with battery back-up siren and radar intrusion sensor. All windows have an auto up/down function and can be operated for up to 45 seconds after the (illuminated) ignition is turned off. The power sunroof standard on IS300 has a one-touch function as well.