Product Description Color: Black Material: ABS Backlight: white LED backlight Sonar: 125 kHz Wireless power consumption: 0,1 W Depth range: 2-148 ft Range: 100m Sonar beam angle: 90 degrees RF: 433,92 MHz Working temperature: -20 ~ 70 ℃ List of things to pack 1x wireless echo sounder (built-in 300mAh battery) 1x receiving host (excluding 4xAAA batteries) 1x USB charging cable 1x antenna 1x leash 1x instruction in English 1x colorful box Wireless sonar with a range of 100 m with sonar sensor for fishing boat with bait. You can access all the data you need on a specific screen: including sea depth, fish condition and more Thanks to the backlight design, it is clearly visible at night. The main unit runs on 4 AAA batteries (batteries not included) and the sensors can be charged using a charging cable. This is the perfect tool for outdoor fishing. Suitable for fishing in areas such as lakes, rivers and oceans. Real photos shared by our customers.