User selectable sensitivity,depth units, and fish alarm setting Operational Temperature: 14°F to 122°F(-10°C to 50°C) Sensitivity indicator Battery save on/off Fish alarm on/off Set up key Battery strength indicator Water depth indicator Backlight on/off Fish depth indicator Enter key Power On/Off Colour:yellow Material:plastic Package Contents: 1 x fish finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 1 .Display: 2inch TN/ANTI-UV LCD 2 .Depth Capability: 328feet(100m) 3. Power Requirement: 4xAAA alkaline batteries(not included) 4. Waterproof design: level-4 (-water-proof) 5.Show water depth, fish location, and bottom grass & rock