DescriptionPower Source : No. 5 BatteryLanguage : EnglishDetecting Range : 0.6-36 MeterPower Input : AASonar Frequency : Wireless: 125KhzSonar Coverage : 90 degreeBrand Name : HiMISSOrigin : Mainland ChinaFeature:Wireless and rechargeable With the wireless technology, long and heavy cable for transducer is no longer needed. The sensor is rechargeable, and the RC is powered by 4 x AAA batteries (not included).Colorized TFT LCD Display The display shows water depth, temperature, power indicator, simulation mode, bottom contour, depth range, depth scale, and fish icon (different sizes).Easy TetherThere're two small holes on the wireless sensor which allow you to tether with your fishing line and cast it onto water as far as you want, so you don't need to drill hole in your boat hull to install the sensor any more.Automatically Turn on The sonar sensor transmitter will turn on automatically when you cast it into water. Please dry it when not using it, or the sensor will keep working.Before Setting RememberThe unit can remember before setting when you turn it off, but depth and temperature units can be changed according to you need.Product Specification:1. DisplayDisplay: Dot Matrix LCDDisplay Size: 50x45mmDisplay Dot Number: 128*96Display Contrast: 10~100%Backlight: White LED Backlight2. Sonar & RadioDepth Range: 2-120Ft/0.6-45MWireless Operating Range : 100mSonar Frequency: 125KHZSonar Beam Angle: 90 degreeRadio Frequency: 433.92 MHzOperational Temperature: -20 ~703. Power Supply:Mainframe : Lithium battery 3.7VTransducer: Polymer battery 3.7VPacking List:Display * 1, Transducer * 1, ;Antenna * 1, USB charging cable * 1, neck strap * 1, ;English Manual * 1