Systems and methods to condition air are disclosed. The resonator piece can include a base portion in which a base portion electrode portion is formed, resonating arm portions, groove portions including groove electrode portions, side surface electrode portions, groove electrode-use connection electrode portions, and side surface electrode-use connection electrode portions 141. A first eccentric pin 151 engaging the first movable blade 81 is disposed at an eccentric position to the first gear 141, and a second eccentric pin 152 engaging the second movable blade 82 is disposed at an eccentric position to the second gear 142.