Feature: 1. This portable depth finder uses 4 x AAA batteries(Not included). Normally this fish finders for kayaks can continue working for 45hours with new batteries. 2. Multifunction, you can use this portable depth finder for various fishing occasion like boat fishing, kayak fishing, sea fishing, ice fishing and so on. Specification: Item Type: Fish Finder Material: Plastic Color: As shown in the picture Weight: Approx.549g/19.4oz Display: 2inch TN/ANTI-UV LCD Backlight: White LED Depth Capability: 328feet(100m) Power Supply: 4 x AAA alkaline batteries (not included) Waterproof Design: Level-4 (spray-water-proof) Show water depth, fish location, and bottom grass & rock User selectable sensitivity,depth units, and fish alarm setting Operating Temperature: -4 to 158(-20 to 70) Package List: 1 x Fish Finder Host(Battery Not Included) 1 x Transducer(Transducer+Floating Foam+Cable) 1 x Screw 1 x Lanyard 1 x Instruction Manual Note: 1. Kindly remind that it has only wired mode, and you cannot match the sensor and monitor randomly.2. Use fish finder in smooth and hard place (like water tank, swimming pool, water bucket, or fish pond) will cause repeatedly sonar reception, or the the detection can be inaccurate. Please use fish finder in outdoor deep water.3. The monitor cannot display the size of the fish.