Transom transducers mount on the transom of the boat in contact with the surface of the water. Many models incorporate an impact release feature that allows the transducer to pivot up and out of the way if struck by an object. 20ft cable and hardware included. This model will work with 200DX, NS25** HDR600**, HDR200** Proflasher**, Wide W, LCR W, 405SX, Legend 1000, 2000
An exciting 256-color sonar performer with temp at a great low price! This unit packs a lot into a small package - 320x240 resolution, FishRevealTM, HyperScrollTM, ASPTM, COLORLINE®, and more!
Outstanding performance and incredible value come together in the Humminbird 581i. See everything on the 5" monochrome display 640 vertical pixels for a crystal clear view. With a screen that size, it's easy to take advantage of the versatile DualBeam Sonar with exclusive Humminbird SwitchFire technology, sensitive enought to track a jig down to 70 feet and seperate fish as close as 2.5" apart. You can also enable Humminbird's Fish ID+ target identification system to convert sonar returns into easy-to-read icons. Get all this technology in a convenient in-dash mount, or use our Tilt & Swivel Disconnect Mounting System. With the versatile, flexible the 581i, the toughest decision you'll make is when to call it a day. This unit also features a 50 channel GPS. This unit includes the head unit (screen), mounting base, internal GPS, transducer, power cord, necessary cables, and instruction manual.
High-quality accessories for your Garmin Fish Finder! Thinking of adding a Speed Sensor to your unit? Speed Sensor (010-10252-00) Plastic Speed Sensor calculates speed of water flowing past your transducer for accurate boat speed readings. Ideal for serious anglers who need to know speed for casting and trolling. Works with Garmin Fishfinder 100, 160 and 240 models; Get your Garmin gear here! Order ONLINE Now! Garmin Speed Sensor
Outstanding performance and incredible value come together in the Humminbird 570 Portable. See everything on the 5" monochrome display with 640 vertical pixels for a crystal clear view. With a screen that size, it's easy to take advantage of the versatile DualBeam Sonar with exclusive Humminbird SwitchFire technology, sensitive enought to track a jig down to 70 feet and seperate fish as close as 2.5" apart. You can also enable Humminbird's Fish ID+ target identification system to convert sonar returns into easy-to-read icons. Get all this technology in a convenient portable configuration that includes a carrying case, suction cup transducer and battery with charger. With the versatile, flexible Humminbird 570 Portable, the toughest decision you'll make is when to call it a day.

For crystal-clear results in the murkiest water, reach for the power-house, High Definition Humminbird 788c. Featuring a 5" diagonal screen, amazing 640V x 640H pixel clarity and unbeatable color and contrast. Packed to the gills with technology, this high-resolution fishfinder boasts an array of advanced features that will have you on the fish in no time. With exclusive Humminbird SwitchFire and DualBeam PLUS technology, you have more fishfinding options than ever. SwitchFire Sonar lets you choose your underwater view, see every detail or just the returns you want. It's the first sonar that adapts with your fishing conditions. Programmable preset buttons put your favorite views at your fingertips. Mount it in-dash, or with our Tilt & Swivel Quick Disconnect Mounting System. Connect to another Humminbird Fishfinder for sharing of sonar, GPS and waypoints at blazing Ethernet speeds. This unit also comes with a 50 channel GPS antenna. (Ethernet adapter cable required for Ethernet connection)

The speed and temperature sensor combines two of the most popular accessory inputs into one compact transom mount unit. Monitors temperature from 25 degrees F to 99 degrees F and speed from 0 to 70 miles per hour. 20ft cable and hardware included. This unit will work with Matrix 10, 15, 17, 20, 25, 27, 55, 65, 67, 77c, 87c, 97; Piranha 1**, 2**, 3*, 4*, 5*; PiranhaMAX 210*, 215*, 220*, 230pt*; Fishfinder 515, 525, 535, 565, 580, 585c, 595c; 931c, 937c; 323, 343c, 363, 383c; 717, 727, 747c, 757c, 767, 777c, 787c; 917c, 931c DF, 937c DF, 937 DF2, 957c. 967c 3D, 947c 3D; Matrix 47 3D, 981c SI, 987c SI. Matrix 35, 37; 737; 575. Optional:(Matrix 67, 87c, 97; 727, 737, 747c, 757c, 767, 777c, 787c) 797c SI, Wide One Hundred, 128,100SX, Wide One Hundred, 128,100SX, 200DX, NS25** HDR600**, HDR200** Proflasher**, Wide W, LCR W, 405SX, Legend 1000, 2000, 997c SI. This product also works with these units - 1155c, 1157c, 1158c, 1197cSI, 1198c SI, 141C, 161, 323, 325, 343C, 345c, 363, 365i, 383C, 385ci, 400TX, 515, 525, 535, 550, 565, 560, 570, 570 DI, 575, 580, 581i, 585C, 586C, 586c HD, 587CI, 587ci HD, 595C, 596C, 596c HD, 596c HD DI, 597CI, 597ci HD, 597ci HD DI, 717, 718, 727, 728, 737, 747c, 755c, 757c, 767, 768, 777c2, 778C, 778c HD, 785 c2, 787c2, 787c2I, 788C, 788ci, 788ci HD, 788ci HD DI, 797c2 SI, 797c2I SI, 798C SI, 798ci SI, 798ci HD SI, 858c, 898c SI, 917C, 931C, 931C DF, 937C, 937C DF, 947C 3D, 955c, 957c, 958c, 967C 3D, 981C SI, 997c SI, 998c SI.