Product: Wireless Bluetooth fish finder Color: black, red Size: 60 * 68 * 63mm Battery capacity: 1000 mA Life time: 20H Sensor: polymer battery 3.7V Wireless frequency: 2.4GHZ Sonar radiation angle: 90 degrees Sonar frequency: 125 kHz Unit: English/metric system can be switched. Operating temperature: -10~60 degrees Celsius Depth alarm: users can set it by themselves. Specifications: 3-step easy fishing: 01. Throw the probe to the fishing spot. 2. Scan and detect fish conditions 03. The detection data is transmitted to the mobile APP in real time.   Bluetooth is connected to the mobile phone wirelessly, and the 125 kHz sonar frequency works in the range of-10 ~ 60℃. It can explore the fish in the range of 105 below, which is easy to use.   Bring your own fish-lure lamp, blue and green fish-lure lamps flash.   With charging indicator, the red indicator lights up when charging, and the green indicator lights up when full.   With fishing line holes, easy to use.   With night vision lamp, you can find the location at night. Package Included: Fish detector× 1 Packing box× 1 USB charging cable× 1 Instruction ×1