[BM-3617] Function: This is an amazing product, specially designed for amateur and professional fishermen. It can find out the fish's position, water depth and bottom contour. Data: The detection range of the fish finder is in the depth of water: 0.4m/1.3ft-100m/328ft. Operating temperature range: minus 20 degrees -70 degrees. Display: The fishing equipment detector is powered by 4 -AAA batteries, and is displayed by a 4.3 * 4cm (1.7 * 1.6in) LCD screen, including the density of the fish and the depth of the water. Suitable: The fish finder can be used in the ocean, river or lake, very suitable for detecting fish schools in any specific area. Accessories: You will get 1*fishfinder, 1*round sensor with 25-foot cable, 1*bracket, 1*stainless steel bolt+nut, 1*neck strap, 1*user manual (English version). Description : This amazing product is especially designed for amateur and professional fishermen alike, to find out the location of fish, depth and bottom contour of water. The unit can be used in ocean, river or lake and is fantastic for detecting schools of fish in any particular area. Features: Wide and clear LCD display. Depth readout from 0.6 to 100m. Fish alarm. Battery save mode. Selectable sensitivity. Fish depth scale. Water temperature indicator. Water-resistant design. Specifications: Display type: TN/ANTI-UV LCD Display size: 4.3 * 4cm / 1.7 * 1.6in Backlighting: White LED Power supply: 4-AAA alkaline batteries (Not included) Measure unit: feet / meter, F / ? Sensor beam angle: 45 degrees Depth range max: 100M / 328Ft Depth range min: 0.6M / 2Ft Operational temperature: (-10?-70?) Main body size: 12 * 7 * 2.5cm / 4.7 * 2.8 * 1.0in Main body weight: 119g / 4.2oz Total weight: 450g / 15.9oz Package size: 27 * 16.5 * 6cm / 10.6 * 6.5 * 2.4in Package weight: 550g / 19.4oz Package List: 1 * Fish Finder 1 * Round Transducer with 25ft Cable 1 * Transducer Adapter 1 * Stainless Bolt 1 * Stainless Wing Nut 1 * Neck Strap 1 * User Manual (English) Note: batteries are not included in the product. Users need to prepare 4-aaa alkaline batteries.