Features:This fish finder can handle temperature of -20?C to +70?C (-4?F to 158?F). Note: Do not place the Sonar sensor directly on an icy surface， cut a whole in the ice first and then place the sonar in the water.Can mount the sonar by:- Fixing it to the boat hull- Using a float on the cable to mount the sonar inside the water- Fixing it on a pole and push it into the desirable position inside the water- Cutting a hole on the ice surface and place the sonar under the waterRemovable floatAudible fish alarmDetermines the location and depth of fishSelectable between meter or feet readingsGet the approximate location of fish and the depth of water Specification: Main Function: Fish Finder with Sonar Sensor + 9 meter cable Display: 2" Anti-UV LCD Backlight: Green LED Sensor Beam Angle: 45 Degrees (200kHz) Depth range: 0.7m to 100m (2ft to 328ft) Sensor Beam Angle: 45 degrees Sonar Cable Length: 9 Meters (29.5 Feet) Operating Temperature: -20 C to 70 C (-4 F to 158 F) Power by: 4 x AAA batteries (not included) Dimensions: L:120 x W:67 x D:25 (mm) PackageIncludes:1.1 xPortable Fish Finder With LCD Screen(4Pcs AAA batteries not included)2.1 xRound Sonar Sensor with 9m (29.5 feet) Cable3.1 xBolt4.1 xWing Nut5.1 xNeck Strap