<b>Specification </b><br>1) Display: 2 inch TN/ANTI-UV LCD Display<br> 2) Depth Capability: 3ft(0.9m)-130ft(40m) <br>3) Wireless Sonar: 90 degrees beam angle in 125Khz<br> 4) Wireless Operational Range: 400feet(120m)<br> 5) Power Requirement: 4xAAA alkaline battery (not included)<br>6) Wireless Sensor battery reauirement: one replaceable CR2032 Lithium Ion Battery(included) <br>7) Waterproof design: level-4 (spray-water-proof)<br> 8) Show water depth, fish location, and bottom grass & rock<br> 9) Operational Temperature: 14°F to 122°F(-10°C to 50°C)<br><br><b>Package list</b><br>1. Monitor x 1<br>2.Sensor x 1<br>3. Antenna x1 <br>4.Neck strap x 1<br>5.User manual x 1<br><br><b>Reminder:</b><br>1. This fish finder can't distinguish fish size, but you can see the relative fish size by adjusting the sensivity.<br>2. As to the wireless sensor battery life, it can work for 5 hours normally.