165T/275LHW-12P Pocket Mount Combo Transducer for DFF3D & TZT3 DisplaysPocket Mount Combination TransducerThis is a new size housing (12 LX 5 W X 3.5 H) that contains DFF3D elements along with CHIRP elements.Standard FeaturesDFF3D operating frequency 165 kHzLow—CHIRPS from 42 kHz to 65 kHz, Beamwidth 25° to 16°High—CHIRPS from 150 kHz to 250 kHz, Beamwidth 25°12M CablesRecommended for a TZT3 and DFF3D installationBuilt-in motion sensorBuilt in temp sensorThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.