Start driving the next generation, mid-size 2004 Prius with Hybrid Synergy Drive.® Completely reconceived, the gas/electric Prius offers all the power of a conventional vehicle, an unheard-of 55 estimated combined mpg and an Advanced Technology Partial Zero Emission Vehicle (AT-PZEV) rating. Not to mention cutting-edge features like available Bluetooth TM technology. Plus, you never need to plug-in for recharging -- which makes the Prius a solution with no cords attached.