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.