2000mW! Absolute rubbish, peaking at 900mW but only for a moment before dropping to 500mW. Complete crap. Within 30 seconds of switching on from the cold, the 2000mW output (hahaha) peaked at 900 and then dropped to 500. This happened while running from a fully charged 4S lipo. I can't understand companies listing these ridiculous power outputs but only delivering 1/4 of the advertised power. Yes, my power meter is calibrated. I can test it all day on my TBS Unify and my Area 1W box and it's dead! Don't buy it because of the advertised rubbish.