Except as limited by an order of the county judge, a magistrate appointed under this subchapter may:
(1) conduct hearings and trials, including jury trials;
(2) hear evidence;
(3) compel production of relevant evidence, including books, papers, vouchers, documents, and other writings;
(4) rule on admissibility of evidence;
(5) issue summons and attachments for the appearance of witnesses;
(6) examine witnesses;
(7) swear witnesses for hearings and trials; and
(8) perform any act and take any measure necessary and proper for the efficient performance of the duties assigned by the county judge.