Features 1.Uses wireless sensor, you can cast it out on the water, the placing location is flexible. 2.Uses echoes sound to detect fish, fit for sea fishing, river fishing, lake fishing and ice fishing, etc. 3.Compact and lightweight, a practical and portable tool to use, convenient to carry. 4.You can adjust the sensitivity settings, then the device can detect and distinguish the small fish and big fish. 5.With it to easily detect the fish, and you don't need to always watch the fishing buoy. Specification Condition: 100% Brand New Item Type: Fish Finder Material: Plasatic Color: Black + Red Depth Range: Approx. 2-148ft / 0.6-36m Wireless Working Range: Approx. 100m/328.1ft Sonar Frequency: 125KHZ Sonar Beam Angle: 90 Degrees RF: 433.92 Mhz Working Temperature: -20-70℃ Host Battery: 4 x AAA Battery (Not Included) Sensor Battery: Polymer Battery 3.7V (Included) Package List 1 x Host 1 x Sensor 1 x Charging Cable 1 x Antenna 1 x Rope 1 x Manual