1Sonar beam: 200kHz sonar beam, signal stability, effectively prevent signal interference. 2Fish Alert: Allows you to catch fish immediately when you're not looking at floats for long periods of time. 3Optional Sensitivity: Choose fish information easily according to your different needs. 4Underwater structure display: providing information and environment below water level to help identify fish targets. 5Battery saving mode, fish depth, scales and size distinction.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: 100% Brand New Item Type: Fish Finder Material: ABS Plastic Model: TL88E Display Type: TN/ UV Protection 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. 12 x 6.5 x 3cm / 4.72 x 2.56 x 1.18inch Weight: Approx. 450g Package List: 1 x Fish Finder 1 x Round Sensor 1 x Screw Bolt 1 x Nut 1 x User Manual