Pure 188 watts RMS transmit power (1,500 watts peak-to-peak). Selective on/off fish ID, shallow/deep and fish alarms, and 4” diagonal LCD display. Dimensions 5.2”H x 5.4”W x 2.6”D. Includes dual-frequency 50/200kHz skimmer transducer plus temp, speed, and distance readings. Completely sealed and waterproof. NMEA 2000 compatibility.