Features: 1. Sonar beam: 200kHz sonar beam, signal stability, effectively prevent signal interference. 2. Fish Alert: Allows you to catch fish immediately when you're not looking at floats for long periods of time. 3. Optional Sensitivity: Choose fish information easily according to your different needs. 4. Underwater structure display: providing information and environment below water level to help identify fish targets. 5. Battery saving mode, fish depth, scales and size distinction. Specification: Condition: Item Type: Fish Finder Material: ABS Plastic Model: TL88E Display Type: TN/ UV LCD Power Supply: 4 x AAA Battery Not Included Sensor Beam Angle: 45° Depth Range: 0.7-100m/2-328ft Working Temperature: -20℃ - +70℃ Size: Approx. 26.5 x 16.8 x 6cm / 10.4 x 6.6 x 2.4inch Weight: Approx. 450g Package List: 1 * Fish Finder 1 * Round Sensor 1 * Screw Bolt 1 * Nut 1 * User Manual fish depth,Sonar beam: 200kHz sonar beam, effectively prevent signal interference. Fish Alert: Allows you to catch fish immediately when you're not looking at floats for long periods of time. Optional Sensitivity: Choose fish information easily according to your different needs. Underwater structure display: providing information and environment below water level to help identify fish targets. Battery saving mode