This fish finder is designed for the liker in fishing. It can detect both fish location and fish size in both fresh and salt water, and can be used as a depth sounder. Features: Wireless, no more long & heavy cable for transducer. Rechargeable, the LCD includes 3.7V rechargeable lithium batteries. 2.4inch TFT color LCD, pixels: 240V * 960H. Sensitivity, zoom, units, depth range, shallow alarm, language, brightness, fish icon, fish alarm and chart speed settings. English / Russian two language options. 10-level sensitivity settings available, higher-degree sensitivity can help you get more accurate chances to detect the fish. Built in memory stores sonar setting when the fish finder is turned off. Wireless Sensor could shut down automatically when it is out of the water. Screen contrast setting to ensure good display color in different environment or observation angle. No need to drill hole in your boat or kayak hull to install the sensor anymore. Two small holes on the wireless sensor allow you to tether with your fishing line and cast it onto water as far as you want. 100m / 328ft wireless operating range, 45m / 147ft depth capability. 90 degrees beam angle in 125Khz (Wireless). Display underwater contour and water temperature. With fish depth scale and audible fish alarm. Small, medium, or big sized fish icon displays on the screen when fish is detected. Simulation mode helps you to learn how to operate the unit before fishing. Compact and lightweight design, easily fit in your pocket. Specification: 1. Display Display: 2.4inch TFT color LCD, pixels: 240V x 960H Display Size: 60 * 45mm / 2.4 * 1.8in Display Contrast: 1~10 level Backlight: White LED Language: English / Russian Waterproof Design: Level-4 (Spray-water-proof) Power: 3.7V rechargeable lithium battery (included) Power Source: DC 10-18V Weight: 148g / 5.22oz 2. Sonar & Radio Depth Capability: 45m / 147ft Wireless Operating Range: 100m / 328ft Sonar Coverage: 90 degrees beam angle in 125Khz Operational Temperature: -14F - 122F (-10C-50C) Power: 1 * replaceable CR2032 battery (included) Size: 79 * 55 * 54cm / 3.1 * 2.2 * 2.1in Weight: 44g / 1.55oz Package Size: 14.8 * 9.6 * 8.2cm / 5.8 * 3.8 * 3.2in Package Weight: 281g / 9.91oz Package List: 1 * Wireless Remote Sonar Sensor 1 * Handheld Wireless Receiving Host 1 * USB Charging Cable 1 * USB AC Adapter Charger 1 * Vehicle Charger 1 * Hand Strap 1 * Manual