How much RAM in HTC Radar windows phone ?

I am thinking to buy HTC Radar mobile phone, one of the reason is I want to try windows phone 7 , it looks now cheaper than before so could be good buy but on seeing specification online, I can't find how much RAM it comes with ... here are the specifications :

• Windows Phone 7.5 OS
  
• 5 MP Primary Camera
  
• 0.3 MP Secondary Camera
  
• 3.8-inch Touchscreen
  
• 1 GHz Scorpion Processor
  
• HD Recording
  
• 2G and 3G Network Support
  

I think better ram means faster and you can run more application simultaneously.