Features: 1Practical: The working voltage is 9?32V, up to 16V, low power consumption, long life, high accuracy, short start up time, the highest depth indication of 100m, you can instantly know the depth of the water. 2Material: Made of stainless steel 316L bezel and anti fog glass, it has excellent anti fog and waterproof properties, and can be used for a long time even in cold sea environments. 3Function: This device is work with 12V system only, to indicate the depth appointed. Normally, the buzzer beeps once when it was connected correctly then turn on the power. 4Mode: Press keypad Mode to switch SH, DP, KL, UN function. Used to turn on or off the monitor. Short press to set the value required, and keep the digital increasing or decreasing fluently. 5Application: Easy to install, good durability, impact resistant, flexible and easy operation, suitable for yachts, small and medium sized boats, fishing boats and other types of marine transportation. Package included: 1 x Depth Sounder 1 x&nbspTransducer (with 10m cable) 2 x Screw 1 x Power Cord 1 x Manual