Features: _x000D_ Sensitive: The sensitivity can be adjusted freely according to the depth of water. _x000D_ Detect and display water depth, approximate fish location, fish size, short & tall weeds, sand & rocks on seabed. Setting can be saved when turned off. _x000D_ Apply to lake, river, sea and other fishing environment. Depth range from 1M to 100m. NOTE: The depth is measured from the sonar sensor, not the float. _x000D_ Round transducer with cable and removable transducer float. Can be used for fishing off the dock, on a boat, and ice fishing. _x000D_ Various features settings: 5 user selectable sensitivity; battery save mode; backlight mode; fish alarm; unit of measure. Water depth shows by meters/feet. _x000D_ _x000D_ _x000D_ Specifications:_x000D_ Condition:100% New_x000D_ Color: As shown in the picture_x000D_ Measure Units: Meters / Feet_x000D_ Display: LCD _x000D_ Backlighting: LED_x000D_ 4.6cm diameter Round transducer sensor_x000D_ Depth Range : maximum: 100m (328ft) ; Minimum: 0.9m (3ft)_x000D_ Sensor Beam Angle: 45 degrees_x000D_ Display the nature or circumstance of bottom of Sea (i.e. grass, rock and sand)_x000D_ Operating Temperature is from -10C to 45C (14F to 113F)_x000D_ Battery: Uses 4*AAA batteries (Not included)_x000D_ _x000D_ _x000D_ How to use the Sonar Sensor: _x000D_ 1. Toss the sensor and float into the water; _x000D_ 2. Attach the Side-Scan Adapter to the boat hull using the mounting tabs; _x000D_ 3. Attach the sensor to a handle, lower the sensor into the water. _x000D_ _x000D_ Package List: _x000D_ 1*Fish Finder_x000D_ 1*Instruction Manual_x000D_ 1*Lanyard_x000D_ 1*Fixing Screw_x000D_ 1*Fixing Frame_x000D_ 1*Sensor_x000D_ _x000D_ _x000D_ _x000D_ Note: _x000D_ 1. It will turn off automatically if the depth display reads "---" continuously for 5 minutes. _x000D_ 2. The transmitter is waterproof, but the receiver (unit with screen) is not waterproof, so please do not submerge or spray the fish finder screen with water. _x000D_ 3. It can not be used to detect bait fish(motionless) or fish that is smaller than 10cm. _x000D_ 4. When use this fish finder on moving boat, please make sure the moving speed is slowly (lower than 5 mph). _x000D_ 5. Extremely cold weather will impact the performance of the product. It is suggested that you keep the unit in temperatures above 0 degrees during operation. _x000D_ 6. Strong waves, suspended matter and muddy water,will affect the performance.