The rugged HT470 is an analog professional wireless handheld transmitter with pilot tone transmission to prevent unexpected startup noise. It continuously sends transmitter data, including low-battery information, to the receiver. An infrared data link in conjunction with the automatic frequency setup makes the HT470 extremely simple to use. The unique dipole-antenna design ensures reliable transmission even when one pole of the antenna is covered completely by the user's hand. An enhanced battery identification automatically detects the used battery type and allows up to 14 hours of operation on one AA-size battery. The display shows the remaining operating time in hours.?