Features 1、1. [Smart Bluetooth link] Bluetooth can link smart devices such as mobile phones/tablets, accurately detect the location of fish, and transmit underwater/under-ice fish information in real-time, which is convenient for viewing and returning images. 2、2. [Fish and depth reading] The portable ice fish finder can detect and display water depth, fish school, fish size, and temperature. The depth data will be updated four times per second at depths ranging from 2.5 to 300 feet (0.8 to 90 meters). It is water-resistant to 65 feet (20 meters), allowing you to use it as a rangefinder or as an aim for snorkeling or diving. 3、3. [Suitable for various fishing methods] Can be used for offshore fishing, kayaking fishing, ice fishing, lake fishing, sea fishing, river fishing, etc. This will be one of your best fishing accessories. 4、4. [Two-color fish lure light] The echo sounder has two-color fish lure light, which is turned on by default. Quickly slide the switch twice to turn the light on and off. Fishing lights are only effective for some fish that are sensitive to light. 5、5. [Perfect gift for fishing enthusiasts]: This portable fish finder has a stylish and lightweight design and small size, which is very suitable for fishing. It is the perfect gift for friends or family who like fishing and outdoor activities! Material: ABS + electronic components Color: black and gray Product size: 19.5x5.4cm Display size: 4.7x1.8cm Battery capacity: 1500mah polymer battery Display mode: anti-ultraviolet TN screen Backlight: highlight LED Sonar frequency: 200KHz Sonar radiation angle: 45 degrees Working temperature: -20℃~50℃ Working current: 200mA Unit: English/Metric can be switched Depth range: 0.8-90m (standard environment) Package List 1*Sonar Fish Finder 1*1500mAh Battery 1*USB Charging Cable 1*Hand Strap 1*Instruction (English) 1*Operation Guide (Chinese and English)