Features: Detection range from 0.6m to 40m, with an accuracy of 0.1m. Displays water bottom contour, water temperature, big/small fish icon, fish depth indicator, battery indicator, fish condition and depth alarm sound. 100-level sensitivity setting, automatic and manual selection of depth range. Auto zoom and quick zoom; user selectable unit between meter and feet. 125KHz sonar frequency, with 90 of wide detection angle. BT connection with your smartphone or tablet, wireless transmission range up to 60 meters. 3-5 hours of long working life on the rechargeable battery. Comes with a drawstring sack and carry case for easy transportation. Specifications: Detection Depth: Max. 40m Upper Limit of Depth Range: 0.6m BT Transmission Range: 60m Sonar Frequency: 125KHz Detection Angle: 90 Working Temperature: -20 ~ 70 Dimension: 8.5 * 6cm / 3.3 * 2.4in Weight: 112g / 3.9oz Case Size: 15 * 13 * 7cm / 5.9 * 5.1 * 2.8in Package Weight: 280g / 9.9oz Package List: 1 * Sonar Fish Finder 1 * Charging Cable 1 * User Manual 1 * Storage Pouch 1 * Carry Case