Portable Fish Finder with Wireless Sonar Sensor Description: The wireless fish finder is portable, affordable and reliable for anglers to find out the location and the sizes of fishes, depth and bottom contour of underwater. This device features a frequency sonar system with LCD screen for powerful performance up to 120 feet. Fish alarm design allows you to instantly capture the fish without watching the float for a long time. Features: Multifunctional and practical fishing helper With this smart fish finder, you can easily get the information about the depth and the condition of the sea, fish depth scale, and fish size distinguishes, water temperature, fish and depth alarm, etc. Also can be used at night White LED backlight design for clear display at night Can be charged by computer or portable battery Parameter: - Powered by 4 x AAA batteries ( not included ) - Sonar: 125KHz wireless / red - Wireless power input: 0.1W - Depth range: 2 - 120 feet / 0.6 - 45m - Wireless operating range: 100m - Sonar frequency: 125KHz - Sonar beam angle: 90 degree - Radio frequency: 433.92MHz - Operational temperature: -20 - 70 Deg.C Package weight: 0.414 kg Package Size(L x W x H): 25.00 x 11.00 x 8.00 cm / 9.84 x 4.33 x 3.15 inches Package Contents: 1 x Wireless Remote Sonar Sensor, 1 x Wireless Receiving Host, 1 x Manual ( English ), 1 x Charge Cable, 1 x String, 1 x Antenna