Sirender is a large police cruiser belonging to Signalman, it can be called with his Signal Whistle. it has the ability to fight in Car mode, or in robot mode. Signalman uses Sirender to aid the Carrangers against giant Bowsock. Its finisher attack is the Signal Flash beam from lights on roof.
Weapons: Siren Daggers (blades that extend from wrists), Siren Shield (riot squad shield), Wappagun (handcuffs on a chain that shoots off), and Siren Vulcan, a laser gun.