Fishfinder 535 Portable features a big, high resolution screen for greater detail and clarity in a portable unit. Features High definition 320V x 320H 5' with UltraBlackreg Contrast Enhancement. 20 degree single beam sonar optimized for coverage and precision bottom detail. Better performance 2000 Watts peak to peak, 250 Watts RMS power output Reliable performance from shallow to 800 feet. Rugged portable case powered by 2 lantern batteries. Suction cup transducer easily mounts on most smooth surface hulls. Real Time Sonarreg instantly captures the action under the boat at up to 40 times per second. Sonar Echo Enhancementreg Technology is so sensitive it'll track a small jig to over 40 ft and separate targets within 2 1Ú2 inches! Tilt Swivel Quick Disconnect Mounting System with no cables to plug in. Choose Selective Fish IDreg or view actual sonar returns. Water temperature included in transducer, speed capable! Choice of Inverse Grayscale, Whitelinereg, High Contras