The 2009 Hummer H3 is available in three trims: H3, H3x, and the H3 Alpha. The H3 and H3x are powered by a 242 horsepower 3.7L inline five-cylinder engine mated to a five-speed manual transmission; where as the Alpha is powered by a 300 horsepower 5.3L V8 engine mated to a four-speed automatic transmission. Standard amenities include OnStar communication system with hands-free telephone, keyless remote entry, tinted glass, and roof rails. Bluetooth wireless capability for hands-free phone operation is now standard on all models. Optional features include an R/V monitor and moon roof. Safety features include tire pressure monitor system, dual front airbags, and front and rear head curtain airbags.