This is a portable fish finder, specifically designed for convenient one-handed use. Its screen displays crucial information such as the depth and temperature of the water, providing you with an approximate location and size of fish schools. This device simplifies the process of finding an optimal fishing position, enhancing your overall fishing experience. Specifications: Material: Plastic Monitor size: 4.7*1.8cm Depth range: 0.8-90m Sonar frequency: 200KHz Sonar radiation angle: 45 degrees Working temperature: -20°C~50°C Working current: 200mA Power supply: 1500mAh lithium polymer battery Product size: 19.7*5.4cm/ 7.8*2.1in Package size: 23.8*8.5*6.5cm/ 9.4*3.3*2.6in Package weight: 500g/ 17.6oz Package list: 1 * fish finder 1 * lanyard 1 * charging cable 1 * instruction manual 1 * battery