Display: Big Adjustable High-contrast Dot matrix FSTN LCD 128(V) x 64(H)<br />Wireless Frequency: 433 MHz<br />125 kHz Sonar Operating Frequency<br />Wireless Sensor Coverage: 90 degrees beam angle<br />Depth Range Max/Min: 2-147 feet(45 meters)/2 feet (0.7 meters)<br /><br />Specifications:<br />Material: Environmental friendly ABS material<br />Power Requirement: 4 x AAA batteries (not included)<br />Built in temperature sensor<br />Operational Temperature: 14~122¡ãF (-10~50¡ãC) <br />Storage Temperature: -4~158¡ãF (-20~70¡ãC) <br />Waterproof design: IPx4 / Level 4 (Spray Water Proof) <br />Operational Range: 300 Feet (100 Meters)<br />Size: 14.7*8*9.5cm<br /><br />Package Included:<br />1 x Wireless Sensor<br />1 x Black and white LCD Fish finder<br />1 x English Instruction Manual<br />1 x USB Charger Cable